Fitbit One Activity Tracker

Priced: $99.95 Rated:   - 4 stars out of 5 by 49 reviews.
Fitbit One Activity Tracker
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Fitbit One Activity Tracker -

The Fitbit One™ activity tracker never rests, even when you do. It tracks steps, distance, calories burned and stairs climbed, and come nightfall, it monitors sleep and wakes you in the morning.

Please Note: This item contains a lithium battery and cannot be shipped to APO, FPO, U.S. Territories, international destinations or Hawaii, and are only available for in-store pickup in Alaska.



  • Fitbit One plays well with several other popular fitness apps, including SparkPeople, Lose It!, MyFitnessPal and MapMyFITNESS, so you can track your health the way you want to


  • Includes a silent wake alarm that gently vibrates to wake you at your desired time without disturbing your partner
  • Sync the Fitbit One with your PC or Mac; free online dashboard gives you a snapshot of your daily and cumulative progress with graphs, tools and charts
  • Fitbit free mobile app for your Apple iPhone® 4S, iPhone 5, iPod touch and 3rd generation iPad keeps track of your stats and celebrates how much you do each day
  • Fitbit One tracker uses a 3D motion sensor to monitor your activity while walking, running, participating in daily activities and sleeping
  • Use the online tool to log your meals, water intake, workouts and weight
  • Wear the tracker clipped to your pants, shirt, undergarments or to the included wristband; wear it clipped to the wristband at night to track your sleep
  • Switch to Sleep mode before you go to bed to track how many times you wake and how long you've slept; a sleep quality score is assigned to help you apply what you learn
  • Connect with friends on to compare stats, share progress, set challenges and cheer each other on
  • Altimeter encourages you to walk up hills and take the stairs by tracking the number of stairs you've climbed throughout the day
  • Fitbit One can also sync over Bluetooth with certain mobile devices, including iPhones® and iPads®
  • Tracker counts how many steps you've taken during the day, assesses how many miles you've traveled and calculates how many calories you've burned
  • Receive badges and alerts on your smartphone for daily, weekly and lifetime achievements to help keep you motivated; receive a weekly email of your stats
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Review RatingNumber of Reviews
Analog or Digital:Digital
Dimensions:1.9 x 0.75 x 0.4 inches
Exercise log:Yes
Heart rate display:No
OS compatibility:Windows / Mac
Pedometer type:Digital 3-axis accelerometer
Tracks calories burned:Yes
Tracks distance:Yes
Tracks steps:Yes
User replaceable battery:No
Weight:0.28 ounce

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Fitbit One Activity Tracker Reviews:

Positive Reviews:

Long-lost love

I dearly loved my Fitbit One. It and the easy-to-use app/website truly motivated me to be more active during the day, be mindful of my sleep, and stay hydrated during the day. And then I lost it trying on dresses for my cousin's wedding.

For casual use, it clipped onto the pockets of my shorts or jeans easily and I rarely felt I had to worry about it. I usually left my One displaying either the time or number of steps, and it was always easy to check or change between tracking settings. The One seemed fairly accurate but I don't use any other activity tracker so I can't compare. Sometimes the stair count was off but Fitbit uses their own calibration to determine this (I believe they state it on their website somewhere, too lazy to check) because public staircases aren't all the same height. It also synced without delay to my computer and smart device.

Some minor cons:
This device isn't suitable for all activities. I played volleyball, so of course wearing the One on my hip wasn't an option but I didn't like the bulky visibility it added when I clipped it onto my bra strap instead. I could see the clip option of wearing the One as a problem for other contact sports - though it seems durable, it probably wouldn't withstand too many hits from someone's helmet or foot; and it unfortunately snags off easily.
It can't track biking movements so I had to rely on another app to track relevant information.

I had several close calls in losing the One when it caught on something I was carrying at waist height. Once it came off on my laundry basket when I was carrying my clean load back and a few times it caught onto the shoulder strap of a duffle bag while moving in/out. When I lost the One, it was either pulled off by one of the bags I was carrying or fell off while robing/disrobing in a dressing room. I'm thinking the former because none of the stores reported finding it.

So ultimately the clip attachment did its job for most activities: it stayed snuggly on and had high accuracy when worn on the hip. But I could have wished for a second alternative for those times when clipping isn't suitable or secure for the activity you're doing. If the sleep band were a little more attractive, and had a velcro closure, I would honestly have opted to wear my One in it on some occasions.

I liked the functions. It was easy to sync and charge. The silent alarm was effective and easy to set. I liked seeing how my progress varied over time, and seeing what I was capable of in a day. If not for the enticing Force, I would definitely buy the Fitbit One again.
PlayOn22 at REI on 01/01/2014

GREAT motivation for getting fit

I'd bought the earlier version, the Fitbit Ultra, to help with my quest to FINALLY lose those last pounds to my goal weight. This is what it took to help make a former couch potato a walkin', exercisin', movin' fool. But my Ultra died due to sweat contact (who was the genius who didn't think to make a pedometer sweatproof???). REI easily and quickly replaced my dead Ultra with the new One.

The One unit itself is smaller and lighter than the Ultra, but unlike the Ultra, isn't a "clip" shape in itself. So unless you put it into your pocket, you'll need to use the included clip - making it about the same size as the Ultra in the end. However, the big differences (and bonuses, IMO) are: a) it's sweatproof (yay!); and b) it has a fantastic little vibrating alarm which you set via the desktop software.

This keeps track of every step I take, every floor I climb, every calorie I burn, AND the quality of my sleep. I love that it synchs automatically with my computer, now via a TINY little dongle that lives in one USB port - and the charging cord it tiny as well. It charges VERY quickly and the charge lasts about 5-7 days,in my experience. My motivation comes from the goals I've set myself - 10,000 steps per day and at least 10 flights of stairs per day (you can set anything you want)...if I don't reach my goal for the day, I find myself making sure I walk around my house, if necessary to get my steps in! I now average 70,000 steps per week (time to up my goal!) - I used to average less than 20,000 (I told you I was a couch potato!). I also wear it on the included wristband every night to track my sleep - and that vibrating alarm, which I was sure I'd sleep through, REALLY works well!! Very quiet (not really "silent," but it's unlikely to wake a partner like an alarm clock would) and it really works! I set alarms throughout the day to remind myself of things like taking vitamins, appointments, etc. It's more handy than I'd expected it to be.

The only drawback with this device is that it IS essentially a pedometer - so activities that don't involve step-like motions aren't recorded totally accurately - things like Zumba (doesn't count any arm movements), spinning, biking, etc.). You CAN overcome that by logging those activities into the desktop manually - but in it's next incarnation, I'd love to see that improved. But for me, that's a relatively small drawback and easily overcome with minimal effort.

I love (and depend on) my Fitbit so much that I've literally turned my car around and gone home when I forgot to put it on in the morning...
RIDiverGirl at REI on 12/12/2012

This thing is amazing!

I first read about the Fitbit Ultra in a golfing magazine - it was recommended in that publication for golfers to monitor the distance they walk. The review was very positive so off to REI I went to get one. I've tried a number of pedometers over the years and found most to be lacking in accuracy but not this little jewel. I have checked it several times with a Garmin Oregon GPS over hikes varying in distance from eight to ten miles and this thing is ALWAYS within 0.05 miles of what the GPS computes and I KNOW the GPS is accurate. I also use it to record altitude gained which it does in the form of "floors" climbed with one floor being ten feet. Again the fitbit is spot on accurate as compared to the Garmin.
I have a account and whenever I bring the device within fifteen feet of my computer it automatically records the distance and altitude I've completed today. The badges awarded by are quite intriguing and fairly easy to earn for the first several levels but then they become a little more difficult.
One of the neatest features of the device in my opinion is its ability to record the quality of your sleep. You place the device in a small wristband and in the morning you "log" your go to bed and get up time and the fitbit does the rest showing "awake" periods in the night and rating the quality (or lack thereof in my case) of your sleep.

The only drawback is the device will not record stairs climbed if you do not actually step up in altitude. My favorite fitness device at the local health club is a rolling stair mill. Much to my disappointment the ultra did not record a single stair step after a 1000 feet of climbing on the device. It also will not record bicycle pedal strokes so I'm crossing my fingers and hoping that the next iteration will do both!

I've taken the plunge and purchased a fitbit aria scale which also logs into your fitbit account recording your weight with respect to goals you've set. Scale is spot on accurate like the fitbit ultra (I've checked it with about 50 pounds of a known weight.

All in all its a great system - the single most accurate pedometer I've ever used and a very accurate altimeter also.

If your into fitness and/or backpacking hiking this is your baby.
jamess at REI on 12/12/2012

Great for Motivation

I had numerous friends and family use one of these with great reviews, so I felt compelled to buy one. I think that it was one of the greatest purchases that I could get for motivation. I feel that I'm already pretty active, but this little guy makes me obsessed with meeting my daily goal. I find myself pacing around the house at night to hit my goals. I like the online community with friends and family for the competitive component. I have become more aware of my water intake by tracking it, and now I feel that I'm consuming more on a daily basis. One of the other main reasons that I purchased this was to track my sleep. I always felt like I was restless and wake up a lot during the night, and the sleep tracker confirmed this. I'm obsessed with checking my quality of sleep in the morning now. Forget to put it in sleep mode, no problem. You can manually enter the time you went to bed and the time you woke up. If you want, you can get all crazy with tracking weight, food intake and other activities. Since I basically eat the same thing every single day, I don't track my food, but I can see how it could be useful.

So everything is unicorns and rainbows you ask? No, the fitbit one does have a few downfalls. One is that the floors walked is tracked by barometric pressure. When I went four-wheeling last weekend and we climbed a pass, I got up to walk around at the top. When I logged in at home, It said that I had hiked 175 floors. Oh yeah, I forgot to mention that you earn badges when you hit certain goals, which aids in motivation. I earned the 175 floors badge, but there was no way to remove it. So, if you are completely nutso about accuracy, this might be a bigger concern for you. It was not a big deal, but it would be nice if I could remove a badge that I did not really earn.

Overall I think this is a great product, it has an incredible battery life and does a good job of both tracking and motivating me to get active on my lazy days. My girlfriend and I both purchased these about 3 weeks ago and I have used every waking and sleeping hour since the purchase.
Thys at REI on 01/01/2014

I'd buy it again for twice as much!!

I bought my Fitbit to keep track of my hiking progress while training for a half marathon. I started with a heart rate monitor and also used my phone with GPS to track my activity, but you always have to remember to turn everything on and record... so that is why I chose to purchase a fitbit. There is nothing to remember, other than remembering to put it on your belt!! I hike a regular 6.5 mile loop with a 1,200 ft elevation change. It tracks my climbs as flights of stairs and lets me know how many steps I have completed each day. It works perfectly.

I was preparing for the half marathon and went on the entire 13.5 mile course one day. When I got home I was exhausted and sat down to rest. Then I remembered it was trash night and I needed to take out the cans. I looked at my fitbit and I had 29,550 steps so far!! I decided to take the cans to the curb one at a time and even came in the house looking for trash bags to empty, all one at a time. I was so sore I was walking like a zombie, but I kept going because I wanted to get my first 30,000 step badge. When I got back in the house I was walking around the kitchen in circles and my wife looked at me like I was crazy. I hit 30,000 and I was jumping around like a crazy person!! I can honestly tell you there is NO WAY I would ever walk around my house after completing a 13.5 mile hike unless it was due to the motivation of this fitbit... it truly works!!

The online dashboard is really well setup and easy to use. The setup is easy. Everything works great. the ONLY negative is my Droid RAZR does not work with it, but it stores your daily totals for 7 days so if you are out of town over the weekend, it will still track your activity, even though you are not near your home computer to sync up each day.

I love the fitbit!!
Flyin Brian at REI on 09/09/2013

Excellent little product!

I purchased this item to help me gather data about my own physical activeness day to day. I work a desk job and know I need to exercise more. Additionally, we just had our first child and I want to be healthier so I can set a good example as well as live longer!

The fitbit one is a great device. It syncs wirelessly when you come into range of a dongle you plug into a USB port on your home computer. Additionally if you have an Andriod or iOS device, some of those are able to sync directly with the fitbit as well (I don't have one of those devices so I cannot comment on that).

I wear the device in some fashion for 24 hours a day. During the night I use the wrist band and use it to monitor my sleep (or lack there of when it comes to our new child!) I love the vibrate alarm feature, it doesn't wake up my wife who's able to get a few minute more of sleep.

The Fitbit website is also very well done. There are some features you have to pay extra for, which I haven't needed so I can't comment on those. The site ties with a lot of other sites so you can easily aggregate your physical activities.

The device itself is small. I usually clip it in my coin pocket if my pants have one, or just on the edge of my front pocket. It's very discreet so the whole world doesn't need to know what you're doing.

In my opinion the device is very accurate. I made my first goal to be never to take the elevator's up, as such, I climb a lot of stairs. When I do 15 floors, the fitbit shows 15 floors have been climbed. The only negative is it doesn't measure going down so my motivation to walk down the stairs is less (I know walking up is more of a work out so not a huge loss there).

I am very happy with this purchase!
Chris in Kirkland at REI on 05/05/2013

Entertaining wearable computer.

I used Sleep by MotionX on the iPhone for a few months to see if I actually wanted the whole activity tracking thing, and turns out I found it fun. Fun enough to blow my dividend check on a Fitbit One this year. So far it has been great. It is small, yet has a good battery, which lasts for about a week, and a clear but basic display for quick information at a glance. Though there is a cheaper model, the One has an altimeter, which is nice when tracking vertical gains. It's also pretty simple, which is a pro and a con.

It is nice that it is so simple. One button handles all the on-device interface, and, at least for me, the software has been flawless on my mac laptop and iPhone, syncing without me having to do a thing. Set up was easy too - I did it on my iPhone in about five minutes. I know others have had problems, but they seem to relate to the Android app or to various PC bluetooth drivers.

It's not so nice sometimes that it is so simple. I wish it could adjust to the sport I was doing (specifically skiing) - seems that the hardware could do it, and that it would be just a matter of software to track it correctly. As it is, it works best for walking/running. The data you get isn't as robust as I imagined. Seems that there is a pay gateway to get access to the more tasty data, and I simply didn't see any mention about there being a pay/free data split before buying into it.

Overall, good product. Hope it lasts for a while - daily carry items tend to take a beating. It's more a toy for me than anything, but I can see how it could help achieve fitness goals one sets, or really help in any training regime. But it is fun, regardless.
Skiattle at REI on 04/04/2013

Good product, but not perfect

I have had none of the software problems described in other reviews. My Fitbit has been problem-free since I started using it about a month ago.

The only complaint I have is that it just doesn't know what to make of cycling. I commute by bike, so leaving it at home isn't an option if I want to monitor all-day activity. I went for a ride today. Fitbit thinks I climbed 99 flights of stairs and took 11717 steps. The ride was about 26 miles, and I did gain & lose the same 100' repeatedly, but I can't figure out if that's an accurate reflection of the day's activities. The ride probably burned about 1000 calories, and Fitbit thinks I've burned 1870 calories today. That's probably close, but I'm guessing.

It does much better on running/walking days. I probably shouldn't complain because the product does not claim to accurately measure activities like cycling. Because I have the Fitbit synced to my Sparkpeople account, I cannot also log exercise because doing so would essentially give me double credit. Maybe that's okay - I don't need to be that obsessive about logging things!

I like the sleep tracker, even though it's really just measuring when you're motionless. I knew before that I get up once or twice a night to use the toilet (I drink a lot of water); I didn't realize how much I move around at night. I've given up my illusion that I'm getting at least 7 1/2 hours of sleep a night.

The clip is pretty tenacious. I wear it on the waist band of my trousers or on a bra strap. It hasn't fallen off yet. The inside of the clip can get sweaty, but I haven't had any performance issues. (The unit appears to be sweatproof.)

Bottom line, it isn't everything I hoped for, but I believe it was worth the price. I would recommend it.
HillSlug98239 at REI on 04/04/2013

Awesome little fitness device

I loved my fitbit but I unfortunately lost it recently. My greatest con with the fitbit One is that it can only be clipped on to clothing. Sometimes I'd forgot to grab the device after changing clothes, and a few times I have "lost" the device while moving bulky items that rubbed against my pocket where I wore the fitbit. All but this last time I managed to find the device attached to whatever else it decided to hook onto. I would love it if Fitbit could provide an optional, discreet wristband option for the One model.

Things I liked about the One:
it's easy to switch the display to show different tracking options
the accuracy of its tracking capabilities (steps, distance, floors, sleep)
it displays the time
it's small
good battery life on single charge
easy to charge and sync
silent alarm was effective; best if you have a set schedule

didn't track distance well for biking or "steps" for pedalling
felt too bulky to wear in my bra
clipping it on wasn't always the desirable way to wear the device
occasionally the sleep band fell off
the sleep timer occasionally got triggered while wearing in my pocket

General pros:
the app/website are easy to use and have a nice appearance
when I did use the food diary, I was more conscious about what and how much I ate of foods; also got me to stay better hydrated
easy to sync with other fitness apps (mapmyride, endomondo, earndit, etc)
PlayOn22 at REI on 08/08/2013

Great fitness tool!

I wear my Fitbit One every day to track steps, distance, and floors. It's a great motivator and makes you concious of just how stationary we are at times (i.e., sitting at a computer at work!). My husband, my sisters, several friends, and I all have Fitbits, and we engage in friendly competitions each week to see who can get the most steps.

The step count is really accurate. The mileage differs sometimes from my Garmin watch, but nothing significant. This version also allows you to track your sleep - I haven't figured out what to do with that information yet, but neat nonetheless!

The only reason I did not give the Fitbit five stars is that my first one died after three months. REI replaced it no problem (so no issue there!). Also, Fitbit sometimes has issues with their servers, and there are periods of time where you cannot sync your Fitbit to your phone or the website. I think it's probably a product of how popular the devices have become in the last six months. Definitely not a reason to not purchase one, just something to be concious of. The iPhone app and online dashboard are very user friendly, and it's easy to sync your Fitbit account with, for example, MyFitnessPal if you already use that site to count calories.
sgreenie at REI on 09/09/2013

Negative Reviews:

Wildly inaccurate

This product is so inaccurate for me it is comical. Some examples:
1. It registered over 2000 steps while I was standing at the stove cooking breakfast.
2. It registered less than 2000 steps and 0 floors of steps on a 9.5 mile hike over 6 tough hills.
3. It generally registers 3000-5000 steps on the drive home from work each day.
And so on and so on. I only keep it because I use the alarm feature to wake up in the morning and remind me to take my medicines each morning and evening.

Since nobody else seems to be having this problem, I'll keep looking for methods of carrying that hopefully will increase accuracy.

As a reference, I also have a similar product from Destination:You provided by my company that is spot on on steps and other activity.
wesbri at REI on 01/01/2014

Been through two of these

I used the fitbit as a motivational tool to lose weight. For that, it worked GREAT! The problem was that it was always getting lost. The first one I owned had a hard clip. Sometime during the day, I noticed it was no longer attached. Never found it. I liked the device so much that I bought the "upgraded" version with the rubber holster. After a few months of heavy use, I guess the rubber became stretched because I lost that one, too. The rubber holster was still attached to me, but the device was gone. If all you do is work out in the gym or run on a track, this might work for you. I don't recommend it for any adventurous outdoor activites. There are better products out there now.
whereverthebootstakeme at REI on 01/01/2014

Great Product, but falls out of Case

This was a gift for my husband. He LOVED it, and thought it was the greatest thing....... until: He wore it for a week, and on the 8th day, it fell out of the case. He put it back in, and the next day it fell out again and now is lost! For the price it should fit very snuggly in the case, not bounce out easily. He had it completely in the case also, so beware of this issue!
Elizabethdawn00 at REI on 05/05/2013

Neutral Reviews:

Things I wish I'd known BEFORE buying

I went through about five Fitbit Ultras before getting the One. All the Fitbits have a lightweight, useful design, track steps accurately & can be used to figure your overall activity & challenge yourself to new fitness goals. But.....

Fitbit One suffers from the same type of problem that the Ultra did - the peripheral support details are HORRIBLE! Probably most frustrating to me is that I bought this device to have LESS work, when, in fact, it creates MORE work. The only way you can USE the information collected by the Fitbit is through the Fitbit software- and getting to that software is now going to consume almost an hour of your time, every day, despite your best efforts.

Do you have a spare 40 minutes a day to troubleshoot your laptop, your android phone, the Fitbit dongle and the interface? I don't - and I'm tired of trying. The software that you download takes priority in my laptop routine, so it comes up first - BEFORE any other software has loaded, and it hogs the operation until it's done - but it's never done. One consequence of this is that my laptop has not connected to my WiFi until AFTER the Fitbit software has loaded, so the Fitbit software ALWAYS tells me that I have "No Internet Connection Found." This necessitates removing the dongle, taking down ALL other programs and reloading the start - and you get to do this again and again and again and again and again and again and again and again and again and again and again and again. You do have other options. You can RELOAD the software, but you must first carefully remove it all first and download it again. Fun? I don't think so.

I've had the Fitbit One about a month now and I've reloaded the software six times, spent 40 minutes a day syncing or attempting to sync about six days per week on average, have downloaded the Android phone version and found it to be as useless as the laptop for syncing - again, the same message over and over, that "No Internet Connection Found" To top it off, it then very neatly goes ONTO the internet, straight to the online help section where you can read the instructions one more time BUT YOU CANNOT SYNC! That's right - you're online, but your software tells you it cannot connect to the internet. No kidding.

When I had the Ultras, I found that actual, bonafide Fitbit support was scarce. The clip would break, I'd email them, they'd promise another within ten days, five weeks later I'd email for a status and they'd tell me that their supplier had changed and it was an inadvertent error and they'd send another. Replacement parts took 8-9 weeks to arrive, on average, IF they ever did, and were all just as poor quality as the original peripherals. Why have an expensive device with 39 cent clips and USB ports whose wires don't last two weeks?

Another thing I've noticed about the One is that the USB charging cable, while more reliable than the prior USB sync port, takes far longer to charge the Fitbit than the product information claims. Mine takes about two hours and must be done about every five days - not exactly the quick, once a week charge they claim.

Bottom line: this is a useful, innovative device, but it's relatively expensive and full of bugs. You will be the beta tester for this product - and whether you find it helpful or frustrating, it will test your patience and resolve.
SpanielMum at REI on 02/02/2013

I needed something more

I gave it a try for a month but felt that I needed something more. It was accurate with the running and walking, but did nothing for me with hiking, rock climbing, biking. Calorie count was totally inaccurate as I had to put in my own estimate for aerobic classes and other activities. I decided I needed a heart rate monitor and GPS and didn't want to wear both.....I think it's good for people who are generally trying to push themselves to do a little more throughout the day, such as walking and stair climbing-but if you are into a lot of different intense activities I wouldn't recommend it.
Grumbley at REI on 05/05/2013

Not impressed with the Fitbit Obe

I'm not impressed with the accuracy of either the step counter or the stair tracker. Both can come up with widely different results for doing the exact same course.

The alarm works when it stays on my arm. But I wake up regularly (LATE) and find the armband has come off my wrist during the night and is hiding under my covers somewhere.

It does stay nicely attached to my bra during the day.

The one very positive thing ... my 7 year old son is infatuated with seeing how many flights of stairs he can do daily.

I'm going to be returning this.
Outside2013 at REI on 01/01/2013

Had problems w first unit freezing.

Bought 2 units. One for my wife and one or me. Hers worked fine. Mine kept freezing. Returned mine and got another. Replacement seems to work fine. Ratings based on working unit.
Athens Ga at REI on 09/09/2013