# PhyOSC vs Shift by GSI

The clearest difference is review sentiment: Shift by GSI at 100% against PhyOSC's 0%. Shift by GSI also leads on rating (5.0 vs 3.0) and in-app purchases (none vs 1). On price, ratings volume, ads and monetization model there is nothing between them.

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

Shift by GSI holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 0% of PhyOSC's written reviews are positive against 100% of Shift by GSI's.

PhyOSC ships an update every 7 months, Shift by GSI every 9 days. The most recent releases landed on September 7, 2026 and August 4, 2026 respectively.

## The numbers

| Metric | PhyOSC | Shift by GSI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/phyosc/id1597684430/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/shift-by-gsi/id6761119037/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 9 MB | 60 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masaru Suzuki](https://appshunter.io/developer/1214200807) | [Keith Anderson](https://appshunter.io/developer/1887871140) |

## 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 |


### Shift by GSI

[App page](https://appshunter.io/ios/app/shift-by-gsi/id6761119037)

Automatically track walks, bike rides, and transit trips to earn rewards and see your environmental impact. Stay motivated with streaks, badges, and community challenges. Discover new ways to get around and reduce your carbon footprint.

**Highlights:** Automatic trip detection (walk, bike, transit), Earn Shift Experience Points (XP), Local business rewards, Streaks and badges for motivation, Community leaderboards and challenges, Route suggestions and guides, School challenges for teachers

**In-app purchases:** none


## Frequently asked questions

### Is PhyOSC free?

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

### Is Shift by GSI free?

Shift by GSI is free to download, with no in-app purchases.

### Which has better reviews, PhyOSC or Shift by GSI?

Shift by GSI is rated higher. PhyOSC averages 3.0 out of 5 from 2 ratings, while Shift by GSI averages 5.0 from 1 ratings.

### Do PhyOSC or Shift by GSI have ads?

Neither PhyOSC nor Shift by GSI shows ads.

### Which is updated more often, PhyOSC or Shift by GSI?

PhyOSC ships an update every 7 months, and Shift by GSI every 9 days. Most recently, PhyOSC was updated on September 7, 2026 and Shift by GSI on August 4, 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.*