CircadiaOS vs FYMind
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CircadiaOS
This app automatically adjusts your bedroom temperature throughout the night to align with your natural sleep cycle. It learns from your wearable data to personalize temperature curves for optimal sleep and recovery.
- Automatic temperature adjustment
- Personalized sleep temperature curves
- Wearable data integration
- Sleep phase tracking
- Comparison of sleep nights
- Smart thermostat control
Read full descriptionHide full description
CircadiaOS adjusts your bedroom temperature through the night, automatically. Your body temperature isn't constant while you sleep. It drops as you fall asleep, stays low through your deepest sleep, and rises again before you wake. A thermostat held at one number all night works against that. CircadiaOS builds a temperature curve for your night and drives your smart thermostat to follow it. Connect a wearable and the curve adapts to your own recorded nights instead of a general model. HOW IT WORKS - Connect your thermostat and your wearable - CircadiaOS builds a curve from your profile on night one - As your nights accumulate, the curve shifts to your own data - See exactly which parts come from your sleep and which are still estimates WHAT YOU SEE - Tonight's schedule, phase by phase - Why each setpoint is what it is - Your best and worst nights, side by side, and what differed Requires a compatible smart thermostat. A wearable is optional but unlocks personalization from your own sleep data. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
FYMind
Read full descriptionHide full description
Free Your Mind is a simple timer for putting your phone down. Open the app and the timer begins. Then leave your phone alone and go do something else. When you come back, FYMind stops the timer and saves your session. Use it to see how long you can stay away from your phone, build a small habit, and surprise yourself. Features: • Automatic timer start • Timer stops when you return to the app • Recent sessions • High scores • Local history stored on your device • No account required
Screenshots
Verdict
The clearest difference is in-app purchases: FYMind at none against CircadiaOS's 5. FYMind also leads on ads (none vs shown). On price, device support and iOS requirement 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. CircadiaOS sells 5 in-app purchases, starting at $2.99 per 7 days. FYMind asks for nothing beyond the download.
| Parameter | CircadiaOS | FYMind |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (11 ratings) — better | — |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 3 days | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 0 MB |
| Age rating | 17+ | 4+ |
| Developer | CircadiaOS LLC | ERIC SAMUEL ANTONOW |
In-app purchases
CircadiaOS
- CircadiaOS Premium (Weekly)$2.997 Days
- CircadiaOS Lite Monthly$6.991 Month
- CircadiaOS14 Days trial$12.991 Month
Show 2 moreShow fewer
- CircadiaOS Lite Yearly$49.991 Year
- CircadiaOS14 Days trial$99.991 Year
FYMind
No in-app purchases









