Choosing a kids fitness tracker.

Listen to this guide 11 minutes, read aloud

The best kids fitness tracker is the one a child keeps on all week: light, tough in the rain, easy to read, and paired with an app a parent controls. The Garmin vívofit jr. 3 ($89.99) suits younger children with a battery that lasts up to a year, the Fitbit Ace LTE ($179.95 plus a $9.99 monthly Ace Pass) adds calling and location, and the MotionCred Activity Fitness Tracker ($49) suits families with an Android phone, especially a student in an eFit class. Children and teens ages 6 to 17 need 60 minutes or more of moderate-to-vigorous activity every day, according to the CDC, and a tracker makes that hour visible.

Key takeaways

• Check six things before you buy: age rules, the phone it pairs with, battery, water rating, screen time and privacy.
• Long battery life keeps a kid's tracker on the wrist. Weekly or yearly charging beats nightly charging for busy families.
• Wearers younger than 13 use MotionCred with permission from a parent or their school.
• MotionCred pairs with Android 9 or newer, so an older hand-me-down phone works.
• The goal is an hour of active play a day, and a step count turns that hour into a game.

Six checks before you buy

1. Age and permission. Each brand handles children differently. MotionCred serves wearers younger than 13 with permission from a parent or their school. The Fitbit Ace LTE sets up a child under 13 with parent and child Google Accounts and the Fitbit Ace app on the parent's phone. The vívofit jr. 3 runs through the Garmin Jr. app on a parent's phone.
2. The phone it pairs with. MotionCred pairs with Android 9 or newer through the free MotionCred app, and its iPhone app is coming soon. The Ace LTE works with Android 11 or newer and iOS 16 or newer.
3. Battery and charging. The vívofit jr. 3 is a simple band that tracks steps and sleep, so it runs up to a year on a watch-style battery a parent swaps, with no charging at all, according to Garmin. MotionCred runs up to 12 days and charges from any USB port through a plug built into the band. The Ace LTE runs 16 hours or more, so it charges every night.
4. Water. The vívofit jr. 3 is swim-friendly and the Ace LTE is rated 5 ATM. MotionCred is rated IP67 for rain, sweat, splashes and hand washing; take it off for swimming.
5. Screen time. The Ace LTE includes movement games and a School Time mode. MotionCred keeps the wrist simple: time, steps, heart rate, and alerts from the apps a parent chooses.
6. Privacy and ongoing costs. The Ace LTE needs an Ace Pass data plan for most features, at $9.99 a month or $119 a year. MotionCred and the vívofit jr. 3 work with free apps, and the MotionCred app carries zero ads.

Three kid-friendly trackers compared

Garmin details from the vívofit jr. 3 product page and Fitbit details from the Fitbit Ace LTE and Ace LTE specs pages, checked October 30, 2026. Prices change often, so check them before you buy.

How much activity do kids need?

The CDC recommends 60 minutes or more of moderate-to-vigorous physical activity every day for children and teens ages 6 to 17. Most of that hour is aerobic: running, biking, dancing, active games. On at least three days a week, it includes vigorous play, muscle strengthening such as climbing, and bone strengthening such as jumping.

A tracker helps a family see the whole day. Recess, a walk to school, sports practice and an evening bike ride add up, and the step count shows which days came close to the hour. A few ideas that turn steps into a game:

• A family step challenge. Everyone wears a tracker for a week, and the winner picks Saturday's breakfast.
• Walk the long way. Add a lap of the block to the walk home from the bus stop.
• Commercial-break moves. Jumping jacks or a dance during every break in a show.
• A sport mode for practice. MotionCred's 25 sport modes record soccer, basketball, jump rope and more as their own sessions with heart rate.

Setting up MotionCred for a child

1. Charge it. Slide the strap off one end and plug the watch into any USB port.
2. Install the free MotionCred app from Google Play on the family's Android phone, running Android 9 or newer, and tap Connect my band. Setup takes about ten minutes.
3. Choose the alerts. Pick which apps may send messages to the watch, so school hours stay focused.
4. For a class or challenge, enter the pairing code from efit.health or challenge.efit.health. For a wearer younger than 13, activity reaches the class or challenge once the parent's or school's permission is recorded.
5. Sync once a week. The watch stores 7 days of activity, so opening the app with the watch nearby keeps every day counted.

When a child outgrows it, Settings, Band, Clear data on band erases the watch, ready for a younger sibling.

When another tracker fits better

• An iPhone-only family: the MotionCred iPhone app is coming soon; the vívofit jr. 3 pairs with a parent's phone today.
• A child who swims often: pick a swim-rated band such as the vívofit jr. 3 or the Ace LTE.
• A family that wants calls and location on the wrist: the Ace LTE with its Ace Pass data plan.

Shopping for an older student? See our best fitness tracker for students in 2026, our Fitbit Air, Inspire 3 and MotionCred comparison, or the family Halloween step guide.

Garmin and vívofit are trademarks of Garmin Ltd. or its subsidiaries. Google, Fitbit and Fitbit Ace are trademarks of Google LLC.

Quick answers

What is the best fitness tracker for kids?

It depends on the child and the family phone. The Garmin vívofit jr. 3 ($89.99) suits younger children with a battery that lasts up to a year and a chore-and-reward app for parents. The Fitbit Ace LTE ($179.95 plus a $9.99 monthly Ace Pass) adds calling, messaging and location. The MotionCred Activity Fitness Tracker ($49) suits families with an Android phone and students in an eFit class, with 12 days per charge and an ad-free app.

How much activity do kids need each day?

The CDC recommends 60 minutes or more of moderate-to-vigorous physical activity every day for children and teens ages 6 to 17, with vigorous activity, muscle strengthening and bone strengthening each on at least three days a week. A tracker shows how close each day comes to that hour.

Can a child use MotionCred if they are younger than 13?

Yes, with permission from a parent or their school. MotionCred is the tracker eFit offers for wearers 12 and under. The watch tracks activity in the app from the first day, and activity reaches an eFit class or eFit Fitness Challenge once the permission is recorded.

Does a kid need their own phone for a fitness tracker?

A shared family phone works. MotionCred stores 7 days of activity on the watch, so a child wears it all week and syncs whenever the family Android phone is nearby. The vívofit jr. 3 syncs through the Garmin Jr. app on a parent's phone.

Is MotionCred waterproof enough for kids?

MotionCred is rated IP67, so rain, sweat, splashes, recess and hand washing are all fine. Take it off for swimming, hot showers and hot tubs. For a child who swims often, choose a swim-rated band such as the vívofit jr. 3.

Does the MotionCred app show ads to kids?

The MotionCred app carries zero ads and leaves location untouched. Sleep, blood oxygen and the wearer's height, weight, age and sex stay on the phone.