# ProperForm vs CircadiaOS

The clearest difference is rating: ProperForm at 5.0 against CircadiaOS's 3.8. ProperForm also leads on in-app purchases (none vs 4) and ads (none vs shown). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. CircadiaOS sells 4 in-app purchases, starting at $9.99 per month. ProperForm asks for nothing beyond the download.

ProperForm holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 11 and 10 respectively. Written reviews point the same way: 100% of ProperForm's written reviews are positive against 75% of CircadiaOS's.

ProperForm ships an update every 5 days, CircadiaOS every 3 days. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ProperForm | CircadiaOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/properform/id6736834562/reviews)** | [3.8 (10 ratings)](https://appshunter.io/ios/app/circadiaos-sleep-tracker/id6761959749/reviews) |
| Number of ratings | **11** | 10 |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 44 MB | 25 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [ProperForm, Inc](https://appshunter.io/developer/1773383976) | [CircadiaOS LLC](https://appshunter.io/developer/1892208236) |

## What reviewers say

### ProperForm

[App page](https://appshunter.io/ios/app/properform/id6736834562)

This app transforms physical therapy and movement sessions into personalized, easy-to-follow programs. Providers can create custom guidance using recorded movements, helping clients stay consistent and make progress between appointments.

**Highlights:** Personalized exercise programs, Session-based guidance, AI-assisted program descriptions, Video guidance for clients, Progress tracking between sessions, Provider documentation tools

**In-app purchases:** none


### CircadiaOS

[App page](https://appshunter.io/ios/app/circadiaos-sleep-tracker/id6761959749)

This app learns your body's ideal sleep temperature and automatically adjusts your smart thermostat throughout the night. It uses data from your wearable to personalize a four-phase temperature schedule for optimal sleep recovery. Requires a compatible smart thermostat and sleep-tracking wearable.

**Highlights:** Learns ideal sleep temperature, Personalized four-phase temperature schedule, Integrates with smart thermostats, Syncs with sleep-tracking wearables, Analyzes sleep quality, Two-week calibration period

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CircadiaOS Lite Monthly | $9.99 | per month |
| CircadiaOS | $19.99 | per month |
| CircadiaOS Lite Yearly | $99.99 | per year |
| CircadiaOS | $159.99 | per year |


## Frequently asked questions

### Is ProperForm free?

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

### Is CircadiaOS free?

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

### Which has better reviews, ProperForm or CircadiaOS?

ProperForm is rated higher. ProperForm averages 5.0 out of 5 from 11 ratings, while CircadiaOS averages 3.8 from 10 ratings.

### Do ProperForm or CircadiaOS have ads?

CircadiaOS shows ads; ProperForm does not.

### Which is updated more often, ProperForm or CircadiaOS?

ProperForm ships an update every 5 days, and CircadiaOS every 3 days. Most recently, ProperForm was updated on October 6, 2026 and CircadiaOS on October 7, 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.*