# The Mindfulness Project App vs SleepEngine

The clearest difference is review sentiment: SleepEngine at 80% against The Mindfulness Project App's 0%. SleepEngine also leads on ads (none vs shown) and update cadence (monthly vs every 19 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

The Mindfulness Project App ships an update every 19 months, SleepEngine monthly. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | The Mindfulness Project App | SleepEngine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (3 ratings)](https://appshunter.io/ios/app/the-mindfulness-project-app/id1186834423/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 41 MB | 78 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Mindfulness Project](https://appshunter.io/developer/1186834422) | [Cambridge Sleep Sciences Ltd](https://appshunter.io/developer/1622392022) |

## What reviewers say

### The Mindfulness Project App

[App page](https://appshunter.io/ios/app/the-mindfulness-project-app/id1186834423)

Access guided meditations and course materials for an 8-week mindfulness program. Connect with a community of fellow meditators and participants.

**Highlights:** Guided meditations, Course handbook access, User community connection, MBSR/MBCT course support

**In-app purchases:** none


### SleepEngine

[App page](https://appshunter.io/ios/app/sleepengine/id6736406638)

This app uses scientifically developed sound technology to help improve sleep quality. It guides your brain through healthy sleep cycles, aiding in falling asleep faster, staying asleep longer, and waking up refreshed. Designed to retrain natural sleep patterns, it offers personalized sleep programs for a better night's rest.

**Highlights:** Scientific sound technology, Guides brain through sleep cycles, Helps fall asleep faster, Reduces waking times, Personalized sleep programs, Bluetooth connectivity to SmartPillow

**In-app purchases:** none


## Frequently asked questions

### Is The Mindfulness Project App free?

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

### Is SleepEngine free?

SleepEngine is free to download, with no in-app purchases.

### Do The Mindfulness Project App or SleepEngine have ads?

The Mindfulness Project App shows ads; SleepEngine does not.

### Which is updated more often, The Mindfulness Project App or SleepEngine?

The Mindfulness Project App ships an update every 19 months, and SleepEngine monthly. Most recently, The Mindfulness Project App was updated on September 30, 2026 and SleepEngine on October 3, 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.*