# Fitbit Ace vs D1 Training

The clearest difference is rating: D1 Training at 4.8 against Fitbit Ace's 4.1. D1 Training also leads on review sentiment (90% vs 49%) and update cadence (weekly vs every 3 weeks). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

D1 Training holds the better App Store score, 4.8 against 4.1. Both are backed by a comparable volume of ratings — 216 and 89 respectively. Written reviews point the same way: 49% of Fitbit Ace's written reviews are positive against 90% of D1 Training's.

Fitbit Ace ships an update every 3 weeks, D1 Training weekly. Both last shipped on September 22, 2026.

## The numbers

| Metric | Fitbit Ace | D1 Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (216 ratings)](https://appshunter.io/ios/app/fitbit-ace/id1621113388/reviews) | **[4.8 (89 ratings)](https://appshunter.io/ios/app/d1-training/id6511237585/reviews)** |
| Number of ratings | **216** | 89 |
| Positive reviews | 49.1% of reviews | **90.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 195 MB | 66 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Google](https://appshunter.io/developer/281956209) | [D1 Sports Franchise LLC](https://appshunter.io/developer/1462763837) |

## What reviewers say

### Fitbit Ace

[App page](https://appshunter.io/ios/app/fitbit-ace/id1621113388)

Manage your child's Fitbit Ace LTE smartwatch. Securely call, text, track location, and monitor activity. Control contacts and ensure peace of mind.

**Highlights:** Secure calling and texting, Real-time location tracking, Activity level monitoring, Contact management, Child's smartwatch management

**In-app purchases:** none

**What reviewers like**

- 👍 Great for kids' independence
- 🔒 Safe communication for kids
- 📍 Reliable location tracking
- 🏃 Motivates kids to be active
- 👨‍👩‍👧‍👦 Easy for parents to use

**What reviewers complain about**

- 🚫 Incompatible with older iOS
- ⚠️ Inappropriate content risk
- 🚫 Features don't work offline
- 🎨 Awful UI aesthetics
- 🖼️ Cannot send images

**Reported bugs**

- Location, calling, and messaging features not working when disconnected from WiFi
- Incoming calls on iPhone from Fitbit Ace have no sound, only vibration
- Message history lost when moving to a new phone
- App does not connect to the watch
- App never loads or says no connection

**Requested features**

- Allow adjusting theme or colors
- Add basic features like photo sharing
- Allow communication between friends with watches
- Enable parents to approve friend connections
- Allow grandparents abroad to use the app


### D1 Training

[App page](https://appshunter.io/ios/app/d1-training/id6511237585)

Manage your fitness journey with this app designed for athletes. View class and personal training schedules, book sessions, and purchase memberships. Stay updated with announcements and shop for gear.

**Highlights:** View class and personal training schedules, Book classes and PT sessions, Join waitlists for classes, Purchase memberships and class packs, Access D1 announcements and shop gear

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Fitbit Ace free?

Fitbit Ace is free to download, with no in-app purchases.

### Is D1 Training free?

D1 Training is free to download, with no in-app purchases.

### Which has better reviews, Fitbit Ace or D1 Training?

D1 Training is rated higher. Fitbit Ace averages 4.1 out of 5 from 216 ratings, while D1 Training averages 4.8 from 89 ratings.

### Do Fitbit Ace or D1 Training have ads?

Neither Fitbit Ace nor D1 Training shows ads.

### Which is updated more often, Fitbit Ace or D1 Training?

Fitbit Ace ships an update every 3 weeks, and D1 Training weekly. Most recently, Fitbit Ace was updated on September 22, 2026 and D1 Training on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*