# STIM onTrack vs HFX

The clearest difference is review sentiment: STIM onTrack at 80% against HFX's 12%. STIM onTrack also leads on rating (4.6 vs 3.5) and ratings volume (7.5K vs 71). On price, update cadence, 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.

STIM onTrack holds the better App Store score, 4.6 against 3.5. That said, the two scores are not equally well evidenced: STIM onTrack has 7.5K ratings behind it against 71, 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 12% of HFX's.

STIM onTrack ships an update every 5 months, HFX every 3 months. The most recent releases landed on September 25, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | STIM onTrack | HFX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (7.5K ratings)](https://appshunter.io/ios/app/stim-ontrack/id1182077255/reviews)** | [3.5 (71 ratings)](https://appshunter.io/ios/app/hfx/id6443477068/reviews) |
| Number of ratings | **7.5K** | 71 |
| Positive reviews | **79.8% of reviews** | 12.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 51 MB | 59 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Orthofix, Inc](https://appshunter.io/developer/1093562244) | [Nevro Corp.](https://appshunter.io/developer/1613247836) |

## 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


### HFX

[App page](https://appshunter.io/ios/app/hfx/id6443477068)

Manage chronic pain with personalized relief. This app pairs with a spinal cord stimulator to learn your pain patterns and deliver tailored therapy. It offers features like progress tracking, favorite program saving, and proactive patient support.

**Highlights:** Personalized pain relief recommendations, Proactive patient support, Save favorite therapy programs, Track pain relief progress, Earn achievement badges, Check device battery level, Enable MRI Mode

**In-app purchases:** none


## Frequently asked questions

### Is STIM onTrack free?

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

### Is HFX free?

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

### Which has better reviews, STIM onTrack or HFX?

STIM onTrack is rated higher. STIM onTrack averages 4.6 out of 5 from 7.5K ratings, while HFX averages 3.5 from 71 ratings.

### Do STIM onTrack or HFX have ads?

Neither STIM onTrack nor HFX shows ads.

### Which is updated more often, STIM onTrack or HFX?

STIM onTrack ships an update every 5 months, and HFX every 3 months. Most recently, STIM onTrack was updated on September 25, 2026 and HFX 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.*