# Unbreakable Mind vs Sleep Efficiency Tracker

The clearest difference is in-app purchases: Sleep Efficiency Tracker at none against Unbreakable Mind's 1. Sleep Efficiency Tracker also leads on update cadence (daily vs every 2 months) and iOS requirement (13.4 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Unbreakable Mind sells 1 in-app purchase, starting at $9.99 per month. Sleep Efficiency Tracker asks for nothing beyond the download.

Unbreakable Mind ships an update every 2 months, Sleep Efficiency Tracker daily. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Unbreakable Mind | Sleep Efficiency Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sleep-efficiency-tracker/id6736605891/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | — | Free |
| Size | 53 MB | 19 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Oliver Ayre](https://appshunter.io/developer/1656584801) | [Sebastian Smith](https://appshunter.io/developer/1674883761) |

## What reviewers say

### Unbreakable Mind

[App page](https://appshunter.io/ios/app/unbreakable-mind/id6560114239)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $9.99 | per month |


### Sleep Efficiency Tracker

[App page](https://appshunter.io/ios/app/sleep-efficiency-tracker/id6736605891)

Improve sleep quality and combat insomnia using CBT-I principles. This tool helps track and optimize sleep patterns by calculating a sleep efficiency score for better rest.

**Highlights:** Track sleep patterns, Calculate sleep efficiency score, Combat insomnia, Based on CBT-I principles, Improve sleep quality, Gain insights for better rest

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unbreakable Mind free?

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

### Is Sleep Efficiency Tracker free?

Sleep Efficiency Tracker is free to download, with no in-app purchases.

### Do Unbreakable Mind or Sleep Efficiency Tracker have ads?

Neither Unbreakable Mind nor Sleep Efficiency Tracker shows ads.

### Which is updated more often, Unbreakable Mind or Sleep Efficiency Tracker?

Unbreakable Mind ships an update every 2 months, and Sleep Efficiency Tracker daily. Most recently, Unbreakable Mind was updated on October 9, 2026 and Sleep Efficiency Tracker on October 6, 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.*