Comparison

heart/work vs PhyOSC

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Generates art from health data
  • Uses heart rate and steps
  • Incorporates environmental data
  • Meditative breathing exercises
  • Customizable art parameters
  • Integrates with HealthKit
Features
Read full description

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.

About

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.

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
Read 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.

Screenshots

heart/work4 screens
PhyOSC4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
heart/work versus PhyOSC: the parameters behind the verdict, then further details
Parameterheart/workPhyOSC
PriceFreeFree
Rating4.0 (3 ratings) — better3.0 (2 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings3 — better2
Update frequencyEvery 5 months — betterEvery 7 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS11.0 — better16.6
Further details — not scored
Size29 MB9 MB
Age rating4+4+
DeveloperMoritz Philip ReckeMasaru Suzuki

Customer experience

heart/work

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

PhyOSC

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

heart/work

One-time1
  • Unlimited Interaction$1.99
1 purchases

PhyOSC

One-time1
  • Unlimited$0.99

Questions

Is heart/work free?
heart/work is free to download, with in-app purchases available.
Is PhyOSC free?
PhyOSC is free to download, with in-app purchases available.
Which has better reviews, heart/work or PhyOSC?
heart/work is rated higher. heart/work averages 4.0 out of 5 from 3 ratings, while PhyOSC averages 3.0 from 2 ratings.
Do heart/work or PhyOSC have ads?
Neither heart/work nor PhyOSC shows ads.
Which is updated more often, heart/work or PhyOSC?
heart/work ships an update every 5 months, and PhyOSC every 7 months. Most recently, heart/work was updated on June 1, 2026 and PhyOSC on September 7, 2026.

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