# synqology vs CircadiaOS

The clearest difference is rating: synqology at 4.9 against CircadiaOS's 3.5. synqology also leads on ads (none vs shown) and review sentiment (100% vs 75%). CircadiaOS's advantage is update cadence (every 3 days vs weekly). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. synqology sells 8 in-app purchases, starting at $2.99 per month and CircadiaOS sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

synqology holds the better App Store score, 4.9 against 3.5. Both are backed by a comparable volume of ratings — 10 and 11 respectively. Written reviews point the same way: 100% of synqology's written reviews are positive against 75% of CircadiaOS's.

synqology ships an update weekly, CircadiaOS every 3 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | synqology | CircadiaOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (10 ratings)](https://appshunter.io/ios/app/synqology-longevity-coaching/id6741556408/reviews)** | [3.5 (11 ratings)](https://appshunter.io/ios/app/circadiaos-sleep-tracker/id6761959749/reviews) |
| Number of ratings | 10 | **11** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 59 MB | 25 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [M1 Labs](https://appshunter.io/developer/1686811349) | [CircadiaOS LLC](https://appshunter.io/developer/1892208236) |

## What reviewers say

### synqology

[App page](https://appshunter.io/ios/app/synqology-longevity-coaching/id6741556408)

This app provides a personalized health command center, transforming your Apple Watch data into an actionable Vitality Index. It uses intelligent AI to offer evidence-informed guidance and allows you to run biohacking experiments to understand the impact of habits and supplements on your health.

**Highlights:** Vitality Index for health trends, AI-powered health assistant (synqIQ), Biohacking experiments for supplements and habits, Sleep Score and Sleep Debt analysis, Momentum tracking for consistency, Unlimited custom metric logging, Seamless Apple Watch integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| synqAI Pro Access | $2.99 | per month |
| synqAI Pro Max Access | $7.99 | per month |
| Pro User | $7.99 | per month |
| Pro Plus User | $14.99 | per month |
| Pro Max Annual | $49.99 | per year |
| Custom Metric Creation | $4.99 | one-time |
| Unlimited Trials and Controls | $19.99 | one-time |
| Lifetime access | $150.00 | one-time |


### 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 synqology free?

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

### Is CircadiaOS free?

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

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

synqology is rated higher. synqology averages 4.9 out of 5 from 10 ratings, while CircadiaOS averages 3.5 from 11 ratings.

### Do synqology or CircadiaOS have ads?

CircadiaOS shows ads; synqology does not.

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

synqology ships an update weekly, and CircadiaOS every 3 days. Most recently, synqology was updated on October 21, 2026 and CircadiaOS on October 24, 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.*