Fitbit Ace 3 full review

Fitness and health are, of course, just as important for kids as adults, and Fitbit has an activity tracker designed especially for young ones in the new Fitbit Ace 3 - aimed at children aged 6 to 12.

The Ace 3 serves as a way to motivate kids to get more active, but in a roundabout way, could also incentivise the whole family to get fitter together (provided everyone involved has a Fitbit of their own to wear).

We take a look at Fitbit's tot-centric tracker to see whether it's the best fit for younger users to track their activity.

A new Fitbit Ace 3 Special Edition has now been launched, based on the popular Minions movie characters.

What's in the box?

The tracker sits within a hardy silicone band in one of two two-tone colourways: Black/Sport Red or Cosmic Blue/Astro Green. The Special Edition Minions model is, as you'd expect, a bright yellow, and you can customise it (or any Ace 3) with additional Minions-themed bands in Despicable Blue and Mischief Black (an extra £24.99 or $29.95).

Unlike other Fitbits, there's just a one-size strap that should fit most children's wrists.

Fitbit Ace 3 unboxed

There's also a proprietary USB charger that clips onto the back of the Ace 3's body magnetically, and better yet, you don't have to remove the tracker from the band to get it charging.

Once unboxed, all that's left to do is set up the tracker using Fitbit's free mobile app (available on both Android and iOS).

Design and build

While it looks less sleek than any of the ‘adult’ Fitbits in the company's lineup, the Ace 3 isn’t blatantly childish, like many children’s activity trackers - even the Minions model.

It's clearly built to withstand the clumsier, knockabout lifestyle of a child, compared to the company's adult-focused trackers and smartwatches; with the tracker's body protected by a wraparound silicone bumper that's integrated into the band.

The Special Edition features an engraved accessory band in Minions Yellow with an embossed Minions design.

Fitbit Ace 3 colours and models

The silicone strap features a watch-like buckle that is much less likely to become detached compared to the pin-loop fastenings on Fitbit's smartwatches. However, it’s quite easy to push the tracker part out of the strap, so be warned that fidgety-fingered kids might detach and possibly lose it, if not shown how to take proper care of their new gadget.

The Ace 3 is water-resistant to 50m, so can be worn in the shower, bath, swimming pool, and even the sea. Most companies forgo suggesting that their water-resistant products can take a dunking in saltwater but Fitbit actively mentions taking the Ace 3 into the ocean, which scores it extra points, in terms of hardiness - based on the company's confident wording.

All that said, unlike other Fitbit trackers, it doesn’t specifically offer swim tracking - even if the in-app manual has a picture of it. This may become a feature to be initiated in some future firmware update, but as of right now it's technically off the table.


The Ace 3's display has more than doubled in size, compared to the 0.7in offering on the blockier Fitbit Ace 2 from 2019.

A 1.47in monochromatic PMOLED touchscreen lets you swipe up and down to see different stats, like steps and Active Minutes but greater customisation over data shown would have been nice. The step counter is small on the first clock face and you have to swipe past another time & date screen before you reach the rest of the stats.

Fitbit Ace 3 screens

Kids can set their own avatars and the Ace 3 comes with a range of clock faces to further personalise their Fitbit experience. There are 20 faces in total - including some animated ones - for example, a bunny, cat, monster, martian and spaceship. 

A new animated clock face, available exclusively to all Ace 3 devices, allows kids to become the Minions’ latest “boss” as the character runs, dances, skateboards and swims on the display.

Garmin’s similarly-priced Vivofit Jr 3 boasts a basic colour screen, but it doesn’t offer much more in terms of functionality by comparison, just an aesthetic edge.

Software and features

The Ace 3 offers a cut-down range of fitness and notification features, compared to Fitbit's 'adult' trackers. It counts steps, logs Active Minutes and monitors basic sleep patterns, but lacks heart-rate tracking.

It’s a little-known fact that the Fitbit Ace 3 actually does include sensors for heart-rate tracking, but they are deactivated and can’t be turned on. This is because it’s basically a cut-down adult tracker, much like the entry-level Fitbit Inspire 2 but in a more robust enclosure for kids.

Fitbit Ace 3 vs Fitbit Inspire 2

That said, it’s much more than just a pedometer, with the Fitbit app offering fun motivating challenges, a timer and a stopwatch. And there are on-screen call and text alerts for children with a smartphone.

Fitbit deliberately excludes calorie counting as a feature, in order to avoid contributing to fixations around calories or weight in younger users. Exercise and all-round activity are the driving forces behind the Fitbit Ace 3.

Motivating kids to be more active

Just showing how many steps they've done in a day is not going to be very interesting to many children.

A Reminders to Move feature prompts the wearer to get off their chair if they haven’t done much for the past 50 minutes and at least 250 steps-per-hour (you set the schedule) is the goal.

Fitbit Family Badges and Challenges

Better still, the excellent Fitbit mobile app awards virtual badges as rewards for hitting activity milestones, and the whole family (plus connected friends) can engage in competitions, (such as Family Faceoff) challenges and adventures, based on their activity - again, as long as everyone wears a Fitbit, of course.

Coming soon are special Minions-themed activity badges, which will be available to all Fitbit users, not just Ace 3 Special Edition owners.

There is a much wider range of adult Fitbits and we've tested them all, so you can choose the best Fitbit for you - based on features, style and price.

Fitbit Kids View and Parents View

The Ace 3 has to be paired to a Fitbit Family account, with a parent getting setup first, followed by the child that the Ace 3 is intended for.

Children up to the age of 13 (and 16 in some countries), can’t officially have their own Fitbit account, which is why the Ace line is the only current Fitbit series that supports a separate Kids View and Parents View.

Fitbit Ace 3 Parent and Kid Views

Once you've input details like your child’s date of birth, gender, and height - which Fitbit uses to customise the child’s experience - using the Parents View, you'll be able to view your child's activity and approve any connections if other people are invited to join in.

The child wearing the Fitbit Ace 3 will then have access to their own Kid View, where they can see their stats, virtual badges and choose their preferred clock face.

Sleep tracking

The Ace 3 also measures basic sleep patterns, showing how long your child is asleep, awake, and restless.

Sleep is an incredibly important part of all our lives, but especially for growing kids. If the Ace 3's bedtime reminders help children go to bed a bit earlier, it's worth the investment through that feature alone.

Fitbit basic sleep graph

More sophisticated Fitbits go much further, using heart rate and other factors to show how long users are in Light, Deep and REM sleep, but for kids, this basic level of measurement seems fine; after all, most parents are just happy that their little ones are quietly tucked up in bed.

Parents can use the Fitbit app to schedule bedtime reminders, as well as silent alarms that wake their kids with gentle buzzing on their wrists.


The Ace 3 boasts an impressive eight-day battery life (the Ace 2 had just five), which is plenty, but as for whose responsibility it is to charge the tracker back up when the battery runs dry, that's up to you (and will likely be you).

Fitbit Ace 3 Charger

I’m surprised it doesn’t match the Inspire 2’s ten-day battery life and, in truth, expect that it will if you don’t overplay the watch face animations too often.

The Garmin Vivofit Jr 3 has a replaceable, rather than rechargeable battery, that lasts around a year.

Price and availability

The Fitbit Ace 3 costs £69.99/US$79.95/CA$99.95/AU$99.95/€79.95, making it the cheapest Fitbit of the current lineup, and you can often find discounts online if you keep looking or just check out our feature on the best Fitbit deals.

The Special Editions Minions model is the same price.

As touched on earlier, it's available in Cosmic Blue with Astro Green touches or Black with Sports Red, with Yellow for the Special Edition. Extra standard bands cost £19.99/US$24.95/CA$29.95/AU$39.95/€24.95, with the extra Minions straps a little pricier at £24.99/US$29.95/CA$39.95/AU$39.95/€29.95.

The previous Ace 2 had more accessory options than the Ace 3, although there is the promise of Minions-based Ace 3 models and straps (Despicable Blue and Mischief Black) on the way.

The Vivofit Jr 3 offers more colour options, plus Marvel and Disney Princess themes, while older kids (let's say 10 and up) might be less enamoured by the chunky, colourful aesthetics of the Ace 3 outright.

If so, one option that keeps you (or rather, your child) within the Fitbit infrastructure is to simply snap Inspire 2 bands onto the Ace 3 tracker, although you'll sacrifice some of that all-important hardiness in the process.


The Fitbit Ace 3 is specifically designed for children (made most obvious by its robust design and fun animated clock faces) and comes with neat Parent and Kid Views from within the Fitbit app. It does, however, lack a bunch of features you’d find on only marginally higher-priced Fitbit trackers, which is a little frustrating.

Older kids may prefer a more ‘adult’ tracker (like the Inspire 2 - although you'd/they'd have to lie about their age during account setup), but for kids up to the age of around 10, the Ace 3 is a great starting tracker that onboards younger family members into the Fitbit experience and keeps them motivated to move with fun challenges and awards.

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