PhyOSC vs Shift by GSI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PhyOSC
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.
- 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
Read full descriptionHide full description
PhyOSC is an application that supports your exercise with Apple Watch, controlling the sound according to your body movement. Instead of uniform music at the sports gym, The instructor's improvisational movement enhances the atmosphere of the venue during the session. ------------------------- Features of PhyOSC ------------------------- 1) PhyOSC receives Core Motion data from Apple Watch on iPhone. The iPhone converts this sensor data and 12 types of arm movements trained by machine learning into OSC messages and sends them to the IP address and Port number to which the DAW is connected. 2) PhyOSC can apply a digital filter when converting Apple Watch Core Motion data received by iPhone into OSC message data. 3) OSC can name and save the filtered settings. This setting can be instantly recalled and switched, so even with the same arm movement, setting A produces a cheering sound effect, and switching to setting B produces a drum kick sound. It realizes a variety of expressions such as changing the waveform of the oscillator and the oscillator. In addition, the TCP / IP address and Port number of the OSC message destination are set in the settings, so you can switch DAW devices by switching the settings. ------------------------- System Requirements ------------------------- PhyOSC requires iPhone and Apple Watch. The required operating environment is as follows: Apple Watch : watchOS 8 Apple Watch Series 5 or higher recommended iPhone: iOS 15 iPhone 8 or higher recommended ------------------------- Limitations ------------------------- The accuracy of machine learning recognition is not 100%. Incorrect results may be output depending on the speed and angle of arm movement. We continue to research the latest research and look for new approaches to improve accuracy.
Shift by GSI
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.
- 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
Read full descriptionHide full description
Shift by Green Streets Initiative detects your walks, bike rides, and transit trips automatically — no tapping, no logging, no thinking about it. Your commute earns you real rewards while you move. See your real impact Every active trip shows you money saved, calories burned, and CO2 prevented — translated into equivalencies like trees planted. Earn rewards Earn Shift Experience Points (XP) on every walk, bike ride, and transit trip. Find rewards from local businesses. Stay motivated with streaks and badges Build daily streaks with a forgiving 2-day grace period. Unlock badges for distance milestones, trying new modes, and braving bad weather. Progress through five tiers from Starter to Trailblazer. Compete with your community Join your neighborhood, workplace, or school automatically. Climb leaderboards and enter monthly challenges. Challenges are based on "shift rate" — the percentage of your trips you walk, bike, or ride transit — so everyone competes fairly. Discover new ways to get around Browse community events, explore personalized route suggestions, and read guides that help you try walking, biking, or transit for trips you haven't before. Shift for Schools Teachers can run classroom walking and biking challenges with a simple wall chart — no student accounts or devices needed. Parents see school standings on the web or right in the app. How it works Shift uses background location to detect and log your trips automatically — no manual input needed. Your points, stats, and streaks update as you go. Free to use. No ads. No subscriptions. Built by Green Streets Initiative, a nonprofit promoting active transportation since 2006.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | PhyOSC | Shift by GSI |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 7 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Requires iOS | 16.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 9 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Masaru Suzuki | Keith Anderson |
Customer experience
PhyOSC
Shift by GSI
In-app purchases
PhyOSC
- Unlimited$0.99
Shift by GSI
No in-app purchases





