# Fitbit Ace vs Aether

The clearest difference is rating: Aether at 5.0 against Fitbit Ace's 4.1. Aether also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). Fitbit Ace's advantage is in-app purchases (none vs 2) and ratings volume (221 vs 1). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. Aether sells 2 in-app purchases, starting at $4.99 per month. Fitbit Ace asks for nothing beyond the download.

Aether holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Fitbit Ace has 221 ratings behind it against 1, so its average is the more settled of the two.

Fitbit Ace ships an update every 3 weeks, Aether every 2 weeks. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Fitbit Ace | Aether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (221 ratings)](https://appshunter.io/ios/app/fitbit-ace/id1621113388/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aether-symptom-and-mood-tracker/id6759995714/reviews)** |
| Number of ratings | **221** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 196 MB | 80 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Google](https://appshunter.io/developer/281956209) | [ThinkComputing LLC](https://appshunter.io/developer/1757062343) |

## 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


### Aether

[App page](https://appshunter.io/ios/app/aether-symptom-and-mood-tracker/id6759995714)

This app uses AI to analyze your logged moods, symptoms, and wearable data to identify hidden patterns and triggers behind how you feel. It provides personalized insights and observations based on your unique data, helping you understand your well-being better. Log various aspects of your health quickly and privately to uncover connections you might otherwise miss.

**Highlights:** AI-driven pattern and trigger identification, Connects wearable data (heart rate, sleep, activity), Personalized insights based on user logs, Quick and private daily logging, Encrypted data with Face ID/Touch ID protection, AI companion for personalized answers

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aether Plus Monthly | $4.99 | per month |
| Aether Plus Yearly | $39.99 | per year |


## Frequently asked questions

### Is Fitbit Ace free?

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

### Is Aether free?

Aether is free to download, with in-app purchases available.

### Which has better reviews, Fitbit Ace or Aether?

Aether is rated higher. Fitbit Ace averages 4.1 out of 5 from 221 ratings, while Aether averages 5.0 from 1 ratings.

### Do Fitbit Ace or Aether have ads?

Neither Fitbit Ace nor Aether shows ads.

### Which is updated more often, Fitbit Ace or Aether?

Fitbit Ace ships an update every 3 weeks, and Aether every 2 weeks. Most recently, Fitbit Ace was updated on October 25, 2026 and Aether on October 13, 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.*