# STIM onTrack vs ActaStim Sync

The clearest difference is rating: STIM onTrack at 4.6 against ActaStim Sync's 4.0. STIM onTrack also leads on review sentiment (80% vs 50%) and ratings volume (8.3K vs 27). ActaStim Sync's advantage is update cadence (every 3 weeks vs every 5 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

STIM onTrack holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: STIM onTrack has 8.3K ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 80% of STIM onTrack's written reviews are positive against 50% of ActaStim Sync's.

STIM onTrack ships an update every 5 months, ActaStim Sync every 3 weeks. The most recent releases landed on October 22, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | STIM onTrack | ActaStim Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (8.3K ratings)](https://appshunter.io/ios/app/stim-ontrack/id1182077255/reviews)** | [4.0 (27 ratings)](https://appshunter.io/ios/app/actastim-sync/id1519311246/reviews) |
| Number of ratings | **8.3K** | 27 |
| Positive reviews | **79.6% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 51 MB | 23 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Orthofix, Inc](https://appshunter.io/developer/1093562244) | [Theragen Inc](https://appshunter.io/developer/1519311248) |

## What reviewers say

### STIM onTrack

[App page](https://appshunter.io/ios/app/stim-ontrack/id1182077255)

This app helps patients manage their bone growth therapy device daily as prescribed by their physician. It offers treatment reminders, a daily calendar, and integration with health tracking apps. Users can also access educational content and connect with support.

**Highlights:** Daily treatment reminders, Device display, Daily treatment calendar, Health app integration (Apple Health, Fitbit, Garmin), One-touch calling to support, Message patient care, Access to FAQs and educational content

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Convenient and lightweight
- 💡 Helpful for tracking progress
- 👍 Comfortable to wear
- 🚀 Straightforward app

**What reviewers complain about**

- 🐛 App connectivity issues
- 🐛 Inaccurate data tracking
- 🔋 Battery life concerns
- 🔒 Lack of data editing/correction options
- 👎 Uncomfortable to wear for extended periods

**Reported bugs**

- App frequently crashes or resets
- Inconsistent data tracking and syncing
- Incorrect battery level reporting
- Calendar not accurately reflecting usage

**Requested features**

- Add ability to edit/correct data entries
- Improve app stability and connectivity
- Implement better battery life management
- Enhance user interface and ergonomics
- Allow more flexibility in treatment scheduling


### ActaStim Sync

[App page](https://appshunter.io/ios/app/actastim-sync/id1519311246)

This app helps users stay focused on their recovery by tracking therapy, activity, and pain levels. It records personal achievements and provides summary reports for doctors to assess progress. Use only under a doctor's care.

**Highlights:** Track therapy, activity, and pain levels, Record personal events and achievements, Provide summary reports to doctors, Offer clarity and perspective on healing, Encourage consistent treatment

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

**In-app purchases:** none


## Frequently asked questions

### Is STIM onTrack free?

STIM onTrack is free to download, with no in-app purchases.

### Is ActaStim Sync free?

ActaStim Sync is free to download, with no in-app purchases.

### Which has better reviews, STIM onTrack or ActaStim Sync?

STIM onTrack is rated higher. STIM onTrack averages 4.6 out of 5 from 8.3K ratings, while ActaStim Sync averages 4.0 from 27 ratings.

### Do STIM onTrack or ActaStim Sync have ads?

Neither STIM onTrack nor ActaStim Sync shows ads.

### Which is updated more often, STIM onTrack or ActaStim Sync?

STIM onTrack ships an update every 5 months, and ActaStim Sync every 3 weeks. Most recently, STIM onTrack was updated on October 22, 2026 and ActaStim Sync on October 8, 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.*