# System W vs HeartOxy

The clearest difference is price: System W at Free against HeartOxy's $3.99. HeartOxy's advantage is update cadence (every 3 days vs every 5 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

System W is free to download; HeartOxy costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

System W ships an update every 5 weeks, HeartOxy every 3 days. The most recent releases landed on October 2, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | System W | HeartOxy |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Size | 77 MB | 7 MB |
| Requires iOS | **15.5** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [WXS Limited](https://appshunter.io/developer/1001387108) | [Boon Piow Leong](https://appshunter.io/developer/1869053126) |

## What reviewers say

### System W

[App page](https://appshunter.io/ios/app/system-w/id1504432053)

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

**In-app purchases:** none


### HeartOxy

[App page](https://appshunter.io/ios/app/heartoxy/id6757838240)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is System W free?

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

### Is HeartOxy free?

HeartOxy costs $3.99, with no in-app purchases.

### Do System W or HeartOxy have ads?

Neither System W nor HeartOxy shows ads.

### Which is updated more often, System W or HeartOxy?

System W ships an update every 5 weeks, and HeartOxy every 3 days. Most recently, System W was updated on October 2, 2026 and HeartOxy 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.*