# iOX vs Rewire

The clearest difference is review sentiment: Rewire at 100% against iOX's 35%. Rewire also leads on rating (5.0 vs 2.8). iOX's advantage is update cadence (every 2 months vs every 7 months) and iOS requirement (12.0 vs 17.6). 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.

Rewire holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 15 and 15 respectively. Written reviews point the same way: 35% of iOX's written reviews are positive against 100% of Rewire's.

iOX ships an update every 2 months, Rewire every 7 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | iOX | Rewire |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (15 ratings)](https://appshunter.io/ios/app/iox/id957603710/reviews) | **[5.0 (15 ratings)](https://appshunter.io/ios/app/rewire-heart-plus-mind-insight/id1460843569/reviews)** |
| Number of ratings | 15 | 15 |
| Positive reviews | 35.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 6 MB | 19 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Safe Heart USA, Inc.](https://appshunter.io/developer/957603709) | [Squid Store, LLC](https://appshunter.io/developer/337033958) |

## What reviewers say

### iOX

[App page](https://appshunter.io/ios/app/iox/id957603710)

This app helps manage your personal health by noninvasively tracking blood oxygenation, heart rate, and perfusion index. It features a plethysmograph display and programmable alarms for health alerts. Data can be easily exported for review.

**Highlights:** Noninvasive SpO2 tracking, Heart rate monitoring, Perfusion index tracking, Plethysmograph display, Programmable alarms, One-click CSV data export

**Features:** macOS Compatibility

**In-app purchases:** none


### Rewire

[App page](https://appshunter.io/ios/app/rewire-heart-plus-mind-insight/id1460843569)

Visualize your stress levels in real-time through heart rate biofeedback. This app translates physiological changes into a dynamic color display, helping you understand your body's responses to daily experiences and practice mindfulness.

**Highlights:** Real-time heart rate biofeedback, Color visualization of stress levels, Personalized resting heart rate baseline, Privacy-first design, data stays on device, Guided mindfulness and calming practices, Optional integration with Rewire Dome display

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

**In-app purchases:** none


## Frequently asked questions

### Is iOX free?

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

### Is Rewire free?

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

### Which has better reviews, iOX or Rewire?

Rewire is rated higher. iOX averages 2.8 out of 5 from 15 ratings, while Rewire averages 5.0 from 15 ratings.

### Do iOX or Rewire have ads?

Neither iOX nor Rewire shows ads.

### Which is updated more often, iOX or Rewire?

iOX ships an update every 2 months, and Rewire every 7 months. Most recently, iOX was updated on October 24, 2026 and Rewire on October 24, 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.*