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Fitbit Ace 2 vs Ace 3: A 2023 Comparison!

Choosing between Fitbit Ace 2 and Ace 3 has never been easier for parents. For that reason, we have prepared this up with the Fitbit Ace 2 vs Ace 3 comparison review to help them find the difference between the activity trackers so that choosing becomes much easier for them.

Summary of how Fitbit Ace 2 and Ace 3 compare: Fitbit Ace 2 uses an AMOLED display while Ace 3 uses a PMOLED display, Fitbit Ace 2 comes with a battery life of 5 days whereas Ace 3 comes with a battery life of 8 days, Fitbit Ace 3 features a Bluetooth connectivity of 4.2 while Versa 2 features a Bluetooth connectivity of 4.0.

So, how do these best Fitbit for kids compare? Here is a brief comparison table of Fitbit Ace 2 vs Fitbit Ace 3.

BATTERY LIFEUp to 5 days (Normal Mode)Up to 8 days (Normal Mode)
WATER RESISTANCE RATINGUp to 50 MetersUp to 50 Meters
CONNECTIVITYBluetooth 4.0Bluetooth 4.2
SENSORSVibration motor, 3-axis accelerometer3-axis accelerometer, Vibration motor
BEST AGES6 and above6 and above
HEALTH AND FITNESS60-minute activity tracking, Sleep tracking, reminders to move; bedtime reminders60-minute activity tracking, Sleep tracking, reminders to move; bedtime reminders
ALERTSalarms; timer & stopwatch, call alert; alarmsalarms; timer & stopwatch, call alert; alarms
COMPATIBILITYAndroid OS 7.0 or higher, Apple iOS 12.2 or higherAndroid OS 7.0 or higher, Apple iOS 12.2 or higher
Fitbit Ace 2 Activity Tracker for Kids 6+
Buy on Amazon
Fitbit Ace 3 Activity Tracker for Kids 6+
Buy on Amazon


Fitbit Ace 2 and 3 are robust a great for kids aged 6 years and above. Both watches feature a flexible silicone build used on most sports watches. The buckle on Ace 2 and 3 is made of plastic. Generally, the Fitbits resemble one another.

There is a slight difference in their sizes, Fitbit Ace 3 is 1.47 x 0.66 x 0.5 inches while Fitbit Ace 2 is 1.47 x .66 x 0.5 inches.  

On the other hand, if you prefer a fitness tracker for kids that comes with a colored screen display for added fun then go for either Fitbit Inspire 2 or Charge 5 while we wait for Fitbit Ace 4 new release.

Even if the upgrade is there the release date is yet to be announced. Although both trackers are great options, Fitbit Ace 3 makes a further step in improving design details and ensuring the screen display is even clearer than Ace 2.

What differentiates Fitbit Ace 3 from Fitbit Ace 2 is the 20+ clock faces which are animated with resemblances like bunnies and cats, your child can use whichever clock face he or she finds awesome.

Ace 3 comes in one size that will fit kids with wrists of 4.8” to 6.8” in circumference. While the Ace 2 will fit children with wrists 4.6” to 6.6” in circumference.


Fitbit Ace 2 features an OLED screen display whereas Fitbit Ace 3 features a PMOLED screen displace.

Both displays are touchscreen and are readable even when in direct sunlight.

Both of these Fitbits for Kids don’t have a colored display. The PMOLED touchscreen display is more power-hungry than the OLED grayscale display.


Fitbit Ace 3 costs more because it adds more features to Ace 2. Fitbit Ace 2 goes for $69.95 / £69.99 / AU$129.95 while Ace 3 costs $74.95.

If you are under budget you can opt for Ace 2 which still has much to offer your beloved son or daughter.

But if you want your kid to own an upgraded version of Fitbit Ace 2 then go for Fitbit Ace 3.

Fitness Activities

Both Fitbit Ace 3 and Ace 2 come with on-screen dashboards that will update your child on his or her steps, sleep and calories burned.

Fitbit Ace 2 and 3 will also be the best companion your son or daughter will have as he or she goes cycling, running and hiking.

The trackers use vibration alerts to remind children that is time to keep moving to meet their fitness goals.

The watches have more to offer little kids from reminders to move, stopwatches, call alerts, sleep-time alarms, and badges among others to keep them active. Ace 2 and Ace 3 both recommend an hour of daily activity for kids.

Water Resistance

If your child loves swimming or frequently forgets to take off things for the wrist either Fitbit Ace 3 or Ace 2 could be the best fitness tracker for him or her.

That is because Fitbit Ace 2 and Ace 3 feature a water resistance rating of up to 50 meters underwater making them the best swimming Fitbit for children.

Caution, do not let your young one take hot showers with Fitbit on. Hot water and sauna baths may cause your child Fitbit much harm.


The table above shows that both Ace 2 and Ace 3 come with the same sensors. The 3-axis accelerometer on these Fitbits can keep track of how many steps your kid makes, the number of floors he or she climbs, distances covered and the number of calories burned.

It is a kid Fitbit doesn’t mean it is limited to doing what other Fitbits can do. Ace 3 can track your child’s heart rate as he or she exercises and provide active minutes reports.

Kids will love how the watch gives major activity stats when they scroll the screen. Apart from call alerts, kids will also be able to see short messages right from the watch when their smartphones aren’t around.

The winner at this point stands out to be Fitbit Ace 3. And that is because it is added with heart rate capability unlike its earlier model the Ace 2.

Battery Life

Battery life is something you will need to consider even when buying an activity tracker for kids. Both smartwatches come with good battery life.

But Fitbit Ace 3 has an outstanding battery life that ensures you only charge it back to fullness after 8 hours.

Fitbit Ace 2 on the other hand will have your kid charge it every 5 days. Fitbit Ace 3 comes with a clip for charging while Ace 2 comes with a magnetic charger.

Go for Fitbit Ace 3 if you are looking for a child tracker that will be able to keep a charge for weeks after single full charges.


Fitbit Ace 3 not only has new features but also all features you will find on Fitbit Ace 2. Unlike the other smartwatch comparisons we have on this site, this particular one is unique.

And that is because Ace 3 is made to improve Ace 2 which is its predecessor. For example, Ace 3 improves battery life for longer workout sessions.

The price difference between the two activity trackers is a stone’s throw. They all offer kids essential fitness features, which makes choosing a bit hard.

We prefer Fitbit Ace 3 over Ace 2 because it is an upgrade. Also, let what works best for your child be the judge for once.

Click here to learn about Fitbit accounts for kids.

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