# The Sleep Project vs Sleep Efficiency Tracker

The clearest difference is update cadence: Sleep Efficiency Tracker at daily against The Sleep Project's every 2 months. Sleep Efficiency Tracker also leads on iOS requirement (13.4 vs 15.1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

The Sleep Project ships an update every 2 months, Sleep Efficiency Tracker daily. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | The Sleep Project | 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** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | Free |
| Size | 22 MB | 19 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Sleep Project Limited](https://appshunter.io/developer/1692328599) | [Sebastian Smith](https://appshunter.io/developer/1674883761) |

## What reviewers say

### The Sleep Project

[App page](https://appshunter.io/ios/app/the-sleep-project/id6450212070)

This app enhances your sleep through educational content and evidence-based tools. It offers structured programs for various sleep challenges, from insomnia to infant sleep, and is designed for participants of specific online coaching programs.

**Highlights:** Free educational content, Evidence-based sleep tools, Structured sleep improvement programs, Tailored solutions for individual needs, Programs for insomnia relief, Infant sleep support, Sleep for peak performance

**Features:** Vision Pro support

**In-app purchases:** none


### 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 The Sleep Project free?

The Sleep Project is free to download, with no in-app purchases.

### Is Sleep Efficiency Tracker free?

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

### Do The Sleep Project or Sleep Efficiency Tracker have ads?

Neither The Sleep Project nor Sleep Efficiency Tracker shows ads.

### Which is updated more often, The Sleep Project or Sleep Efficiency Tracker?

The Sleep Project ships an update every 2 months, and Sleep Efficiency Tracker daily. Most recently, The Sleep Project was updated on October 13, 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.*