# PhyOSC vs Heart Matter

The clearest difference is in-app purchases: Heart Matter at none against PhyOSC's 1. Heart Matter also leads on update cadence (every 5 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PhyOSC sells 1 one-off in-app purchase. Heart Matter asks for nothing beyond the download.

PhyOSC ships an update every 7 months, Heart Matter every 5 weeks. The most recent releases landed on September 22, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | PhyOSC | Heart Matter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/phyosc/id1597684430/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 9 MB | 5 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Masaru Suzuki](https://appshunter.io/developer/1214200807) | [ILHYUN KOH](https://appshunter.io/developer/1797052265) |

## What reviewers say

### PhyOSC

[App page](https://appshunter.io/ios/app/phyosc/id1597684430)

This app uses Apple Watch data to control sound based on your body movements. It converts sensor data and arm movements into OSC messages for DAWs, allowing for dynamic soundscapes during exercise. Customize filters and settings for varied audio expressions.

**Highlights:** Receives Core Motion data from Apple Watch, Converts sensor data to OSC messages, Supports 12 types of arm movements, Applies digital filters to data, Saves and recalls filtered settings, Switches DAW devices via settings

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited | $0.99 | one-time |


### Heart Matter

[App page](https://appshunter.io/ios/app/heart-matter/id6747369540)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PhyOSC free?

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

### Is Heart Matter free?

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

### Do PhyOSC or Heart Matter have ads?

Neither PhyOSC nor Heart Matter shows ads.

### Which is updated more often, PhyOSC or Heart Matter?

PhyOSC ships an update every 7 months, and Heart Matter every 5 weeks. Most recently, PhyOSC was updated on September 22, 2026 and Heart Matter on October 3, 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.*