Search  for anything...
Fitbit

Fitbit Ace 3 Activity-Tracker for Kids 6+ One Size, Black/Racer Red

  • Based on 9,810 reviews
Condition: New
Checking for the best price...
$74.98 Why this price?
Save $4.02 was $79.00

Buy Now, Pay Later

As low as $12.50 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Feb 17
Order within 12 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Color: Black/Racer Red


Features

  • Kids spend less time charging and more time moving with up to 8 days of battery (varies with use and other factors)
  • Animated clock faces grow and develop as kids move more throughout the day
  • All-day activity tracking shows how healthy habits add up to a healthier life
  • Help kids form healthy sleep habits with sleep tracking, bedtime reminders and silent alarms
  • Bring on the pool party cannonballs or lunchtime spillsFitbit Ace 3 is water resistant to 50 meters
  • Kids earn virtual badges and fun on-screen celebrations when they reach their goals
  • A family account lets parents manage kids Ace 3 and their own watch or tracker from one easy place

Description

Get kids moving and make fitness fun with Fitbit Ace 3. With activity and sleep tracking and up to 8 days of battery, the water resistant (up to 50 meters) Ace 3 motivates kids, friends and family to build healthy habits together. Fitbit is part of the Google family. Requires use of Fitbit app with compatible iPhone or Android devices. A Google account will be required.

Operating System: android


Memory Storage Capacity: 6400 MB


Special Feature: Water resistant


Battery Capacity: 8 Amp Hours


Connectivity Technology: Bluetooth


Wireless Communication Standard: Bluetooth


Battery Cell Composition: Lithium Ion


GPS: Built-in GPS


Shape: Rectangular


Screen Size: 0.96


Language ‏ : ‎ English, English, English, English, English


Product Dimensions ‏ : ‎ 3.35 x 0.8 x 4.13 inches; 0.68 ounces


Item model number ‏ : ‎ FB419BKRD


Batteries ‏ : ‎ 1 Lithium Polymer batteries required. (included)


Date First Available ‏ : ‎ March 9, 2021


Manufacturer ‏ : ‎ Fitbit Inc


Best Sellers Rank: #12,071 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #75 in Activity & Fitness Trackers


#75 in Activity & Fitness Trackers:


Customer Reviews: 4.1 4.1 out of 5 stars (9,879)


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Feb 17

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great Kids’ Fitbit with Minimal Issues
Color: Blue Astro Green
Overall, this kids’ Fitbit has been a great purchase! The battery life is impressive — it easily lasts over a week, even with 24-hour wear. The sleep tracking option is a nice bonus, and it’s waterproof, which gives me peace of mind when my kid forgets to take it off for showers or swimming. The only downsides are that we had to buy a new charger after the original one stopped working within a few months, and the watch only syncs the correct time when it’s regularly connected to Bluetooth. Despite those minor annoyances, it’s a fun and motivating fitness tracker for kids. I’d still recommend it! ... show more
Reviewed in the United States on July 10, 2025 by Makayla
    • Fitbit Ace 3 for Children
Color: Black/Racer Red
A great little first watch for our daughter. She loves it.
Reviewed in the United States on January 22, 2026 by tom carroll
    • Absolute Trash Setup Process
Color: Blue Astro Green
**UPDATED REVIEW** Let me hopefully save you some headache. If you have an Android device, it seems that this process is a bit easier and the Fitbit app accepts a kid's Google account; however, if you only have iOS devices these are the issues, and the resolution: 1) The Ace 3 is designed for kids, but... 2) It REQUIRES a kids Google account, (and now that Google owns Fitbit, there are no non-Google accounts allowed to be created on Fitbit) 3) Anyone under 13 has to have a supervised Google account 4) Fitbit engineers overlooked this MAJOR detail and supervised accounts don't work on Fitbit right now 5) Changing an non-kid account to a kid account (via a birthdate change) doesn't work; Fitbit now says this type of account can't be used. 6) So, the only way it seems to make this work is to create a brand new child Google account FROM THE GOOGLE FAMILY DASHBOARD. If you don't create it from there, it won't work. I burned multiple Google accounts trying other ways. 6) I still think the setup process makes this worth one star at best. It's absurd that a product made for kids can't just be setup easily. It's also absurd that Fitbit requires all Google accounts, but hey DATA. 7) The dumb part is the Charge 6 we bought for our older child was so simple to set up. Everything worked the first time and it was done in 30 seconds. **ORIGINAL REVIEW** Would give zero stars if possible. Google, get your crap together. Setting up an Ace 3 on a supervised Google account doesn't work in the Fitbit app that you've now broken. And GUESS WHAT, a kid under 13 HAS TO HAVE A SUPERVISED GOOGLE ACCOUNT. Oh, I know, I'll just use a Google account with an older birthdate on it — NOPE, NOW THE FIBIT APP SAYS THAT'S NOT A KID ACCOUNT. Fix your junk and stop ruining Christmas for kids. ... show more
Reviewed in the United States on December 25, 2023 by T. Corbin
    • Nice active tracker for kids or adults looking for something basic
Color: Black/Racer Red
I like it for my son but... I had to lie about his age ( I had to put it in he was 12 instead of 13 on the app) because the app and watch are set up to only work on a parents account and once the child turns thirteen the app tries to force him to have his own account. The watch will not let it be set up on a private account for a thirteen year old. It was very inconvenient. It has held up well to being banged around and being in water. It was easy for my child to learn how to use. It does not break up the sleep tracking like their other Fitbits. It will only tell you how many hours he or she slept but it will not tell you how much of that was deep sleep, REM sleep or light sleep. I think it is a bit expensive for what it offers and the hoops you have to jump through if your child is 13 or almost 13 are no fun. I would only recommend if you can find it for sale like 50% off. ... show more
Reviewed in the United States on July 23, 2022 by Evangiline Melanson
    • Great fitness tracker for kids
Color: Black/Racer Red
Got this for my child for a birthday gift and they loved it. It was easy to add them to my Fitbit account and it is fun to track their steps and sleep as well
Reviewed in the United States on January 10, 2026 by MM
    • Great for use as a Potty Watch!
Color: Yellow
We were looking for a way to help remind our child to use the bathroom throughout the day while at school. This fitbit - priced at $50 is a bit more expensive than other "potty watches" but you can set up to 8 timers throughout the day - varying by day (different schedule say M-W-F) with either a sounded alarm or silent vibration. This thing worked OUTSTANDING. Not only is it 100% waterproof- but the battery life of 1.5-2 weeks is also spectacular. Every $20-$30 option we could find for a potty watch seemed to fall short in quality or functionality. The wristband (minions) seems a little flimsy and expect it to fail within about 6 months- but otherwise if we can get 1 good solid year out of this device I will call it a win. My child also really likes the step count, and I find the sleep tracking to be extremely interesting and insightful! All in all a very good well made product for a child's entry fitbit as well use for steps, sleep tracking, and a potty watch reminder. I do recommend! ... show more
Reviewed in the United States on October 24, 2022 by Nathanael T. Heinle
    • great product
Color: Black/Racer Red
My grandson was wanting one so we bought this from him and made him very happy.
Reviewed in the United States on December 30, 2025 by marinedr.d

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...