heart/work vs PhyOSC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
heart/work
This app generates unique artwork based on your health data, including heart rate, steps, and environmental factors. It uses meditative breathing exercises and personal preferences to create layered visuals, offering a novel way to visualize wellbeing.
- Generates art from health data
- Uses heart rate and steps
- Incorporates environmental data
- Meditative breathing exercises
- Customizable art parameters
- Integrates with HealthKit
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Introducing *heart/work*, the only iOS app that generates original artwork based on your unique health information. Bridging the gap between wellbeing and health data, heart/work creates layered visuals to provide at-a-glance synopsis using meditative breathing exercises, your heartbeat and environmental data from your current surroundings. Maintain your exercise streaks by completing heart/work everyday and generate a new piece of art, straight from your heart. The heart/work is generated based on different attributes like: - heart beat s during exercise - HRV (heart rate variability) - resting heart beat - # of steps taken - distance for running / walking - stairs climbed - active energy burned - local weather & climate - location information - mood - favorite color Customize the number of breaths, meditation session length, and favorite color - let heart/work do the rest. heart/work is using HealthKit data to create visuals. Access to the data is required for the app to work. No personally identifiable data is ever shared with anyone. Created with love at the Apple Developer Academy in Naples, Italy.
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
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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.
Screenshots
Verdict
The clearest difference is rating: heart/work at 4.0 against PhyOSC's 3.0. heart/work also leads on iOS requirement (11.0 vs 16.6). PhyOSC's advantage is monetization model (free vs free with in-app purchases). On price, review sentiment, ratings volume and update cadence 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. heart/work sells 1 one-off in-app purchase and PhyOSC sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
heart/work holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 0% and 0% positive.
heart/work ships an update every 5 months, PhyOSC every 7 months. The most recent releases landed on June 1, 2026 and September 7, 2026 respectively.
| Parameter | heart/work | PhyOSC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 5 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, Apple Watch |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 29 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Moritz Philip Recke | Masaru Suzuki |
Customer experience
heart/work
PhyOSC
In-app purchases
heart/work
- Unlimited Interaction$1.99
PhyOSC
- Unlimited$0.99









