Fitbit Flex Wireless Activity Tracker and Sleep Wristband

I have only had this a few days now but these are my initial impressions: You have to wear it on your wrist (duh) but that means comfort is important. Its superbly comfortable to the point I no longer think about it. Functionality, it seems to be very good. The distances seem about right and it is already motivating me to get out to meet or exceed my target, something I would never have done on my own. The software, very good. I have mine on an IMac, an Android phone and a Chrome OS laptop (doesn't support the dongle). I can sync using the Imac with the dongle attached and with my phone via bluetooth or NFC, both work fine. I can only view and not sync with the Chromebook but this is not a problem because I always have my phone with me. My wife only has her phone and Chromebook so can't use the dongle. Syncing with her phone is fine and as a minimum this is all you need. Battery life so far seems very good, I am into my first week and have only charged on day one and that's with a daily alarm. The alarm is really good and has a snooze if you read the instructions, you can set it for a one off or repeat for various days of the week or weekend. No need for anything else now. My only question is how it deals with changes to and from BST, don't know, I will have to find out. Worse case scenario is I set a phone alarm twice a year. I have the black one and have a very conservative job, I don't think it looks out of place and only one person (who wants to buy one) seems to have noticed it. Hitting your daily target at unexpected times still makes me jump and on one occasion some one said 'Are you ok?' so I had to explain lol. I'm sure I will get used to it. Changing all of the settings is easy and intuitive and all in all once you have set it up you can just forget about it apart from the occasional sync so you can see how you are doing. I like the sleep setting but it tends to tell you what you already know, I had a rubbish night's sleep or I had a good night's sleep. There have been some comments about durability of the strap but only time will tell. I will report back in time. Spare straps seem to be widely available and with a whole range of colours. After a week of ownership I would say get one.

I have have been wearing my fitbit 15 full days and have lost 7lb already! I had always thought that as part of my job means a lot of movement and lifting that I should be pretty fit, now I know why I wasn't! I have mine set to 10000 steps per day, pretty shocked to find that I maybe only do 4000 to 5000 steps a day so it is clear that I need more excercise, the tracker has made sure that I have done this extra excercise, not every day but some days I will do more steps to even it out. walking up and down the house at 11pm at night just to get those 10000 steps is now a must! As it tracks my sleep, and I don't bother to tap it into sleep mode, it still records, not surprised at how many times I wake up in the night, though if I am stillin bed I can still be awake and it states that I am asleep, so not 100% accurate but not bad. It only seems to give me 1120 cals to eat per day which for me seems low especially as I selected that I only wanted a 1.5 LB loss per week, however, the more steps I do, the more cals it adds on for me. Some of the registered foods and the cal value is a little wrong but you can add your own. I realised that my endless cups of coffee through the day were serioulsy zapping my cals, tea uses up much less. And so logging everything that I eat really makes a difference, most days I have some cals left over - allows for a small treat once a week so that I am not feeling deprived. One thing that i was shocked at was the kind of excercise I am getting, mostly light and so i have been really pushing myself to get moderate and was really pleased when i managed some intense excercise, it really is an insentive to carry on. I tend to knock mine a lot andthe lights start to flash, I have no idea really what they all mean, but it still works, it doesn't seem to buzz like it is supposed to but it still works. And so this bit of kit really does encourage you to stay on track with excercise and diet and is the best diet aid that I have ever used, better than a gym membership and diet clubs. Worth every penny!

We've had this now for 5 months and I have to say it's a nice device. I purchased this primarily for my wife to track her sleep as she was always tired. The fitbit flex consists of two parts; a strap and the fitbit which slips into it. The flex is like a tiny spaceage capsule with tiny lights to indicate things like charging, your mode (daytime or sleep), and how far you are through your 10,000 daily steps. To get the fitbit up and running you have to create an account on fitbit.com and then assign your flex to that account. You can do this on any device that supports low-power bluetooth (for example the iphone 4s and above or ipad 3 and above). We had an ipad 2, so had to use our laptop with the fitbit provided bluetooth USB dongle. The process of assigning your fitbit to your account is simple, and from that point all you have to do is regular internet sync to get the data off the flex and into your fitbit.com account. For the first few weeks in using a flex just accept that you'll be syncing after every bout of exercise and taking a peek at your fitbit.com account stats. It's cool, but happily the novelty does wear off and in time you might be able to wean yourself to stat checking just twice a week. Good things about the flex: 1) Easy process to setup and sync 2) Good battery (we find it's about 7 days) 3) Very comfortable band (you don't know you're wearing it) 4) Website overview of your activity nice (daytime and sleep) Things that could be improved are, 1) The device only holds 7 days of data. This was a pity when we were on holiday and had no access to the internet for a sync. When we got back home and sync'd we'd lost the first week of data. 2) The bands could be more robust. Ours split after a few months (but contacting fitbit directly got us a speedy replacement) 3) Battery level indicator only available online and limited to the battery level at last sync. This is a problem for us as we've no native low-power bluetooth devices so syncing required a little extra effort (and for us can't be done on the move). 4) I really wish fitbit didn't use the "Tracker" terminology when referring to the device. My wife at first thought I was actually *tracking* her which made for an uncomfortable conversation. In summary, it's been a very successful device for us and support from fitbit has been excellent. Turned out my lady was getting sometimes just 2hrs proper sleep a night (compared to my 7 as measured by the fitbit!) which allowed us to trial a few lifestyle changes to see how we could improve that.

Okay, so it has taken me a year to get around to reviewing this, but I feel I can give the review the good and the bad over a longer period of time than most. It has made me more aware of how (in)active I am from day to day, the display is easy to understand and the vibration when you have achieved your daily step goal (you can change this) can be quite satisfying. I initially used the sleep monitor but soon started to forget to change modes when going to sleep or waking and although you can set the sleep start/stop times on the website and it gives you the sleep data, I gave up on this in the end. Sometimes it was quite stubborn about changing modes too, and I would be jabbing away at it like some deranged creature and getting nowhere even after shouting "SLEEP, YOU BASTARD!!" at it, and by the time I had got it to change I was too wound up to sleep. At other times it would switch modes while I was applauding at a talk or conference. As for the build quality, the strap has started to split after a year of near constant wear. Initially I was quite annoyed about this but then I remembered the punishment I put it through in the first week of ownership and I soon forgave Fitbit for this. Picture the scene, I had gone out with friends to see Senser (check them out if you haven't heard their music, I recommend the 'How to do battle' album in particular. Go on, have a listen to 'The end of the world show') playing live and I had forgotten to remove my nice new Flex before going out. The support acts had warmed the crowd up nicely and things kicked off when Senser played. All bands play harder when they are live but this was mosh pit heaven!! I dived in there and went at it until I felt I was about to collapse. When I crawled out of the pit for a break and a drink I discovered that my Flex was gone!! Fallen off my wrist somewhere out there in a moshpit that could have flattened Dresden. I looked around but there was a sea of heavy looking blokes in boots leaping about and going batshit crazy, my heart sunk to think that my brand new Flex was probably smashed to pieces and was unlikely to be much more than dust by the time a few hundred boots had landed on it, but I felt it was a worthy sacrifice to such a great live musical act. At the end of the show when people where filtering out I, with heavy heart, searched for what was going to be left of it. It was INTACT!!! It was covered in black bootprints and far from where I had been happily losing the plot, but despite the marks (which washed off), a slight pinch mark at the corner of the bracelet screen, and a few scratches on the metal clip thingumy, it had survived something that should surely have sent it to silicon heaven! Still serving me well on a daily basis this has to be the toughest and best bit of fitness gear I have purchased. Oh, and the battery STILL lasts me nearly a full week on one charge. If you are only going to take it for walks or runs you can rest assured it will take it in its stride.

I have been using a Fitbit Flex continuously for three months. Yesterday I took it off and don't plan to put it back on any time soon. There are a number of reasons for this, but the primary one is obsolescence. When I bought my Flex I was looking for a reliable activity tracker with a decent App, and at the time that's precisely what I got. Whilst I already owned a Moto 360 (1st gen) smart watch which I loved, I found its performance as an activity tracker was limited by the need to rely on the underdeveloped Google Fit and Moto Body Apps. I could have bought another monitoring App, but was concerned about compatibility with the Moto. Far better, I reasoned, to buy a dedicated Activity Tracker with a well established eco-system, so I went for the Flex and I didn't regret my choice, finding both tracker and app to be user friendly, intuitive, capable and reliable. Over the intervening three months however, technology has caught up with the Flex. Upgrades to Android Wear, improvements to Google Fit and the release of a supporting, 'on-phone' Moto Body App (replacing the rubbish original 'in-watch' version) have slowly turned my Moto360 into a highly capable activity tracker with greater functionality than the Flex. Why wear a rubber bracelet on your right wrist when the watch on your left is doing everything it does and more? So its 'sorry Flex', but your time has passed. Of course none of that is the Flex's fault, but it is indicative of the one of the device's key downsides; its narrow functionality. Basically the Flex is just a pedometer with bluetooth connectivity, wrapped inside a rubber bracelet and that's all it will ever be. It will record the number of steps you take, but if you want to do anything else, such as record the route of your run or how many calories you've burn't then you need the App on your phone. If you want to monitor your heart rate too then you're entirely out of luck and will need a different piece of hardware. Yes, it might claim to monitor your sleep patterns, but basically its just registering any movement whilst you sleep and extrapolating from that data (again within the App) whether or not you have been restless, which is hardly the most rigorously scientific method possible. So, if all you're looking for is a small pedometer that will connect to your phone (or PC) and is supported by a pretty decent native app, then the Fitbit Flex will probably tick all your boxes. If however, you're looking for greater functionality then there are an increasing number of better alternatives out there, and the most flexible ones, like the Moto 360 and the Apple Smartwatch are able to add new functionalities or improve existing ones via simple software upgrades, rather than needing new hardware. Yes, I hear you say, but those alternatives are far more expensive. Which is true, but even heavily reduced on Amazon, the Flex is not inexpensive for a device that essentially only does one thing. 'But its more robust than a smart watch' is another argument in its favour. But is it a valid one? I have had my Moto 360 longer than my Flex and I would argue that the former looks in better condition than the latter. Plus my Moto 360 is just as water and dust resistant as my Flex. Of course a Smart Watch or a more capable activity tracker will require more regular charging, whilst a Flex will normally run for several days without needing a recharge. This is true most of the time, but on a couple of occasions my Flex has mysteriously failed to hold its charge for more than a day, despite coming off a lengthy charging session. Its also failed several times to notify me, via the app, that its battery was running low, leaving it dead on my wrist. In fact the reliability of the sync between Flex and phone can be rather erratic, with the two devices often refusing to pair up despite multiple attempts to get them to do so. I periodically have similar issues syncing watch and phone too of course, but at least by put my watch on charge every night I never find it suddenly dies on my wrist without warning. All in all the Flex is not a bad product if all you want to do is monitor how many steps you take each day and get a rough idea of how many calories you burn in the process, but you could get the same by buying a far cheaper standard pedometer, downloading any one of a number of free activity monitoring Apps and keeping track of your progress manually. Alternatively there are far more capable activity tracking products on the market which do a whole lot more than the Flex, some of which are made by Fitbit. Yes, they will cost quite a lot more but you might find them to be more informative and therefore more useful than the rather limited Flex.

I've had this device for around ten months, and it's stopped syncing with my phone (a Samsung Note 3), which I've been using to track my progress (or lack of progress...). So far as I can tell, the Bluetooth has stopped working. I haven't misused the device in any way I can think of. Therefore I can't recommend this at all. Below is the review I posted around nine months ago, which may still be of some interest. ========================================================================================= I've been using this for around four weeks and I'm generally very pleased with it - but there are some considerable limitations. One of the two most useful elements is the sleep tracking. It confirmed that I already knew, that on some nights I wake up multiple times, but it also told me that usually I wasn't awake for very long, even though it might have felt like it. That said, I do wonder how accurately it can distinguish between lying still trying to go to sleep and actually being asleep. The other most useful element is that it has made me exercise significantly more. Whenever possible, I get off the tube two stops early and walk the rest of the way to work, and I do the reverse in the evening - and this takes my past my 10,000 steps target every day. Before I had the Fitbit, I was just thinking that increasing my walking might be a good idea - being able to quantify the added exercise has made me start doing this, and I think it will make me carry on. Also I am pleased with Android app and the way the Fitbit syncs with it. Also having the sensor vibrate when I meet my steps target sometimes makes me take a detour just to get to my target. Now for the not so good elements. First, there are times when I don't successfully track my sleep. So far as I can tell, I have switched it to sleep mode, but it seem that it hasn't been successful and no sleep is recorded. Since tracking my sleep is important to me, it's very annoying when that happens. Secondly, the Fitbit doesn't register cycling as activity. I spent around 45 minutes cycling with my son earlier today, and no activity was registered. All Fitbit seems to capture is arm movement, which there is relatively little of in cycling. (As yet, I haven't had the opportunity to swim with the Fitbit on, and I'll be interested to see how that works out.) Also, I'm not very impressed with the charging arrangements, having to dig out the Fitbit sensor from wrist band every day or two seems like a good way of ensuring the wrist band won't last long. And why did Fitbit make the cable on the USB charger so ridiculously short? I had to buy a USB extension cable. Finally, I haven't yet used the Fitbit to monitor swimming, but this is something I intend to try. In summary, I'm finding the Fitbit generally useful, and intend to carry on using it for now. But in the long run, I want to replace it with a monitor that overcomes the Fitbit's limitations. But if your fitness regime does not involve cycling or other activities where your arms don't move very much, the Fitbit is convenient and unobtrusive (unlike some of its competitors), and it may be all you need. UPDATE at another 6 weeks or so in: I'm still having a problem getting the Fitbit to reliably track my sleep. So far as I can tell I've got it into the correct mode to track sleep (and switched it back to normal mode in the morning) but around one night in four, it doesn't log any sleep. This is very irritating! But on the other hand, the Fitbit is still getting me to exercise more than I would otherwise. For the past few weeks, I've had to work at home more than usual, and the Fitbit encourages me to make time for a walk in the local park to top up the number of steps for the day. Ultimately, I would like to find something better in the long run. Quite what I'm not sure yet...

Sings: I like to move it, move it! I've had this since it first came out in the UK and I am noticing that I've increased my activity output hugely, and much of it is because just seeing the Fitbit Flex on my wrist is a constant reminder to move more. It's so easy to check my goal progress throughout my working day; all it takes is a couple of taps on the band and a solid light shows for each 20% of my goal I've achieved, whilst the next light flashes to show I'm working on it. I am really surprised how encouraging those flashing lights are, and how motivated I am being kept. I'm rewarded with badges for each new goal I achieve, too. I have to admit I'm not usually an exercising kind of person and I don't have much time for it these days. I mainly got this because I love reviewing gadgets and I thought 'how cool it would be if it worked'. To be honest I didn't actually expect it to make much of a difference to my lazy ways, yet here I am a few weeks later, still keen and still losing weight. What an impact, a real boost to my general health and well-being the FitBit Flex has made! So what else does it do apart from keep me motivated? It tracks my steps, distance and calories burned. I can also log my daily food intake - although the database is American - I find MyFitnessPal works better for UK users, and both are compatible with each other. What is recorded there, syncs easily with the FitBit app - available on iPod/Pad and many phones. Instantly launch your Fitbit app by tapping your device with your NFC-enabled Android phone. Best check if yours is compatible if this is important to you. Otherwise you can just download a programme to your computer PC, Mac or Linux, from which you can sync your tracker just as easily. Once synced you log into your FitBit dashboard where you can see your progress in various goals. You can even track your sleeping habits (bedtime, sleeping hours, times awake, time up), the amount of steps you and what time of day (or night) you take them. You can also join many others, in an online community to share your success and keep each other motivated. There are many other various compatible apps this can connect to; Sparkpeople, LoseIt!, MyFitnessPal, MapMyFitness, Runkeeper, and Endomondo. Plus some WiFi Scales Fitbit Aria Wi-Fi Smart Scale (bought separately). The Flex is comfortable to wear and has a silent (vibrating) alarm system, so you can wake up without waking up your other half, and you can also set more than one alarm for various things. I have mine go off while I am at work at times, and it doesn't affect any of my colleagues at all. Other things the Flex can monitor if you log them, or have compatible gadgets are activities, heart, blood pressure, and glucose. There is even a place to write your journal/diary entries. Seems the FitBit Flex guys and gals have thought of everything - even a rechargeable battery and a dongle to plug into your computer. There is, for an additional premium of about £40 per annum, a more in depth reporting system available. It does give you more to play with and there is an interesting 'Personal Trainer' aspect of it, in which it checks your progress and works out new goals according to whether you want to maintain the same weight or lose more. This is free for a 7 day trial, and worth a go to see if you like it. Yes, it does up the price annoyingly so, but can you put a price on fitness? I think it's worth every penny as this works as a good motivational tool for me. I mean, I've gone from couch potato to actually wanting to walk to town each lunchtime and walking the dogs in the morning just to gain more steps. And I want to do more... I'm even gearing up to get on my bike and cycle to work! Now that's a life improvement I cannot thank FitBit Flex enough for!

UPDATE: started running recently ( for fitness and also for weight loss) so have been using the fitbit to track my exercise, a feature I previously hadn't used. It has been brilliant! So easy to use and incredibly motivating, you can set up ( very easily) voice cues to inform you when you have completed distances ( for example i have it set to tell me every half mile) and to give you information at this point such as how long you have been exercising and how many calories burnt so far. It even gives you a little map of the route you have taken at the end of the run. This feature does mean you have to take your phone on the run with you which is the only possible downside i can see, I already take my phone as i use it along with a set of wireless headphones for my music, the headphones work on bluetooth, same as the fitbit and i have had no problems with them interfering with each other, in fact the voice cues i get from the fitbit just come straight through my headphones :). Without using the app regularly it will only remind you to do 10,000 steps a day which is good but is only a fraction of its usefulness! I've lost 5lb so far. Coupled with the app ifs a great device though i do wish id spent the extra money for the next level up. I use it in conjunction with myfitnesspal ( you can link the 2 apps) and its doing wonders for my diet. I can measure roughly my calories in and out and also track my progress. Keeps you on track and reminds you to be more active in life.

Satisfied with the Fitbit.

The Flex works really well and is very accurate. It seemlessly syncs with my phone or computer whenever I need. I like that it's very simple, but there is a lot of information on the app that you can record and reference. I also like that you can change out the band colors to better match your outfits if you choose to where the fitbit all day long. The sleep tracker works well and is easy to turn on and off. If you are a sleeper that does not move around much, you may have to adjust the sensitivity. I also enjoy that you can switch it to your dominant hand and still have it read accurately. I charge it about once a week and it does not take very long. When you are watching TV at night, charge the FitBit and it will be ready to go when you are ready for bed or in the morning.

Hatte zuerst ein Armband einer anderen Firma gekauft, welches auf den ersten Blick auch sehr gut war, sich dann aber nicht synchronisieren lies. Mit dem Fitbit ist das alles total easy. Leider ist die Schlafanalyse nicht sooo genau dargestellt wie beispielsweise beim Garmin, aber die Daten, die es sammelt, stimmen im Großen uns Ganzen mit den Daten meines Atemgeräts überein und darauf kommt es mir an. Anhand der Dioden kann man so in etwa erkennen, wieviele Schritte man an dem Tag bereits gemacht hat - wenn mans genau wissen will synchronisiert man zwischendurch mal eben. Funktioniert einwandfrei über Bluetooth mit meinem Nokia Lumia 1020 Windows Phone und ebenso gut mit dem PC bzw. Laptop. Ist am Handy Bluetooth eingeschaltet, werden die Daten permanent übertragen, wenn Armband und Handy in entsprechendem Abstand zueinander sind. Das Armband selber ist sehr leicht, stört nicht wrklich im Alltag und auch der Verschluss ist sehr gut. Natürlich zeigt es keine Uhrzeit oder so an, weil ja halt nur die 5 kleinen Dioden da sind, aber als Einsteigermodell um mal zu testen, ob sowas überhaupt für einen geeignet ist, absolut in Ordnung. Über die Bluetooth-Verbindung bekommt man sogar eine Meldung auf's Handy bzw. PC wenn der Akku geladen werden muss. Die Gefahr, dass man das vergisst, ist also gering. Schade, dass der Akku nur 5 bis 6 Tage hält - beim Garmin zB muss nur nach etwa 12 Monaten die Batterie getauscht werden. Ausserdem schade, dass es zwar Spritzwassergeschützt ist - kann beim Duschen also dran bleiben - aber zum Schwimmen sollte man es abnehmen. Ich nehm es allerdings auch beim Duschen ab, da es unten - wo man den Tracker ins Armvabd steckt - "offen" ist und ich es einfach irgendwie auf Dauer wohl ein wenig ekelig finde, wenn sich da so ein Wasser-Schweiss-Duschgel-was-weiss-ich-was-Gemisch bildet, wenn man es beim Duschen umlässt und Feuchtigkeit reinkommt. Alles in allem empfehlenswert!

Ho appena acquistato questa FitBand della Fitbit.Premetto che è il mio primo activity tracker e lo sto usando ormai da qualche giorno. Partiamo dalla box.Due bracialetti in morbidissimo silicone gommato,molto comodo,uno taglia S l’altro di taglia L.Il dispositivo vero e proprio invece ha le dimensioni di un fagiolo (infatti non mi spiego come faccia la batteria a durare cosi tanto in un dispositivo cosi piccolo!),con il logo fitbit sulla smussatura angolata,dotato di accellerometro,bluetooth 4.0 (uno dei protocolli bluetooth maggiormente aggiornati al fine di consumare minor energia possibile) e sensore di vibrazione,che,come ben saprete,serve per la funzione sveglia (e vi sveglia,eccome se vi sveglia!vibrazione molto forte) e per la modalità notte,che si attiva con dei tap continuativi.Infine è dotato di una CPU,che registra passi,calorie e distanze.Premetto infine che non è il classico touch screen iper sensibile:bisogna spesso dare dei veri e propri “colpetti” per attivare il display.Le luci,non sto qui a ripeterlo,indicano i progressi effettuati,a seconda che vogliate guardare i passi,le calorie bruciate o la distanza.Quasi tutti,da come ho avuto modo di constatare comunque,siamo sempre interessati ai passi che facciamo.Si controlla e collega comodamente e rapidamente con l’applicazione,dalla quale possiamo anche programmare la sveglia.L’app è fatta DAVVERO molto bene. Venendo all’affidabilità…beh amici miei,qualche passetto in più ve lo conta (secondo me).Soprattutto rimane il problema auto,perchè l’accellerometro fa sempre e comunque il suo lavoro.E nelle macchine si sa,per farle partire,bisogna “accellerare”.Ma secondo me pero in qualche modo lui “capisce” che si viaggia a velocità più elevate e non si sta semplicemente camminando o correndo.Quindi conta pochi passi.Ma è normale che i passi che a noi interessano sono indicativi.Nel senso:a me interessa sapere se al giorno,ad esempio,almeno 5000 benedetti passi riesco a farli.Se sono 5300,non mi interessa quel dato indicativo aggiuntivo di 300 passi eventualmente falsati da macchina,bicicletta o via discorrendo.Quindi in conclusione:si avvicina alla precisione per i miei personali gusti per un dispositivo del genere,ma ovviamente non è precisissimo al 100%.Quindi come voto sul conteggio passi,calorie,distanza do un bell’ 8 pieno. Venendo alla modalità notte è la più simpatica secondo me.Ti fa letteralmente,sulla app,un grafico di come hai trascorso la notte,il numero di ore dormite,quanto il vostro sonno sia stato regolare o agitato.Ed è bello “osservare” come abbiamo dormito,come abbiamo “vissuto” mentre non eravamo vigili.Mi è piaciuto tanto! La modalità sveglia,come torno a ripetere,funziona egregiamente. In conclusione:dispositivo activity tracker di ottima fattura.Do 5 stelle perchè,per carità,la tecnologia evolve ogni giorno e sicuramente realizzeranno dispositivi ancor più accurati,ma ad oggi,in base all’attuale stato della tecnologia,e secondo la mia esperienza e quella di chi come me ha provato FitBit Flex,devo dire che questo dispositivo è veramente affidabile.Da stimoli,e fidatevi che li da,perchè sarete ossessionati dal vedere accese quelle 5 lucine che indicano che avete raggiunto il vostro obbiettivo giornaliero,e la vostra salute vi ringrazierà.Come ripetono i medici,basta anche mezz’ora di passeggiata al giorno per stare in salute e in forma.Presto acquisterò anche la Fitbit Aria,da abbinare al mio dispositivo per avere un quadro completo sui miei progressi.Speriamo si riveli altrettanto efficiente come questo dispositivo.Saluti,e spero di esservi stato d’aiuto. Buone passeggiate.

Mira que he criticado a Fitbit por no traer a España el Force y por no tener una política de información transparente hacia sus clientes con los problemas del mismo. Al final me decidí a probar el Flex ante el anuncio de que se dejaba de vender el Force. El funcionamiento desde el principio ha sido impecable. La integración de la APP con Android y sin PC ha sido perfecta. La pulsera es muy cómoda. El precio a 80€ muy razonable. Vamos... que sólo en caso de que solucionen los problemas con Force o un nuevo modelo de Flex para que me plantee sustituir mi Flex. Como único pero decir que el complemento perfecto del Flex, la báscula Aria es demasiado cara a 110-120€ para que la compre. Por lo demás, su quieres motivación para andar - correr sin problemas con App (sobretodo si eres Android, no lo dudes, Flex es perfecta.