# CircadiaOS vs Qstack Daily Mindset Questions

The clearest difference is rating: Qstack Daily Mindset Questions at 5.0 against CircadiaOS's 3.8. Qstack Daily Mindset Questions also leads on ads (none vs shown) and review sentiment (100% vs 75%). CircadiaOS's advantage is update cadence (every 3 days vs every 10 days). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. CircadiaOS sells 4 in-app purchases, starting at $9.99 per month and Qstack Daily Mindset Questions sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Qstack Daily Mindset Questions holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 10 and 4 respectively. Written reviews point the same way: 75% of CircadiaOS's written reviews are positive against 100% of Qstack Daily Mindset Questions's.

CircadiaOS ships an update every 3 days, Qstack Daily Mindset Questions every 10 days. The most recent releases landed on October 7, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | CircadiaOS | Qstack Daily Mindset Questions |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (10 ratings)](https://appshunter.io/ios/app/circadiaos-sleep-tracker/id6761959749/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/qstack-daily-mindset-questions/id6764468053/reviews)** |
| Number of ratings | **10** | 4 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 10 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 25 MB | 59 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [CircadiaOS LLC](https://appshunter.io/developer/1892208236) | [NEXTGEN MARKET STRATEGIES LLC](https://appshunter.io/developer/1860927969) |

## What reviewers say

### 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 |


### Qstack Daily Mindset Questions

[App page](https://appshunter.io/ios/app/qstack-daily-mindset-questions/id6764468053)

This app helps you rewire your mind by asking five personalized questions daily across key life areas. It leverages neuroscience and cognitive behavioral therapy to shift your focus and foster lasting identity-based change.

**Highlights:** Personalized daily questions, Lock screen notifications, Neuroscience-based approach, Cognitive Behavioral Therapy principles, Identity-based transformation, Answer writing for retention

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Qstack Weekly | $1.99 | per 7 days |
| Qstack Weekly | $3.99 | per 7 days |
| Qstack Monthly | $9.99 | per month |
| Qstack Monthly | $14.99 | per month |
| Qstack Annual | $99.99 | per year |


## Frequently asked questions

### Is CircadiaOS free?

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

### Is Qstack Daily Mindset Questions free?

Qstack Daily Mindset Questions is free to download, with in-app purchases available.

### Which has better reviews, CircadiaOS or Qstack Daily Mindset Questions?

Qstack Daily Mindset Questions is rated higher. CircadiaOS averages 3.8 out of 5 from 10 ratings, while Qstack Daily Mindset Questions averages 5.0 from 4 ratings.

### Do CircadiaOS or Qstack Daily Mindset Questions have ads?

CircadiaOS shows ads; Qstack Daily Mindset Questions does not.

### Which is updated more often, CircadiaOS or Qstack Daily Mindset Questions?

CircadiaOS ships an update every 3 days, and Qstack Daily Mindset Questions every 10 days. Most recently, CircadiaOS was updated on October 7, 2026 and Qstack Daily Mindset Questions on September 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.*