# Somni vs SleepStack

The clearest difference is rating: Somni at 5.0 against SleepStack's 4.0. Somni also leads on in-app purchases (none vs 3) and update cadence (every 4 days vs every 10 days). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. SleepStack sells 3 in-app purchases, starting at $4.99 per 7 days. Somni asks for nothing beyond the download.

Somni holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Somni ships an update every 4 days, SleepStack every 10 days. The most recent releases landed on October 7, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Somni | SleepStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/somni-sleep-ai/id6757822455/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/sleepstack-sleep-protocol/id6760767864/reviews) |
| Number of ratings | 2 | **4** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 10 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 49 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Pure Somni](https://appshunter.io/developer/1867852782) | [NUNE LLC](https://appshunter.io/developer/1838850912) |

## What reviewers say

### Somni

[App page](https://appshunter.io/ios/app/somni-sleep-ai/id6757822455)

This AI-powered sleep coach analyzes data from your wearable devices to provide personalized insights and recommendations for better rest. Chat with your AI coach to understand your sleep patterns and receive evidence-based strategies tailored to your goals.

**Highlights:** Wearable data analysis, AI sleep coaching chatbot, Personalized sleep recommendations, Evidence-based strategies, Privacy-focused design, Connects multiple devices

**Features:** macOS Compatibility

**In-app purchases:** none


### SleepStack

[App page](https://appshunter.io/ios/app/sleepstack-sleep-protocol/id6760767864)

This app helps you build better sleep habits with guided routines, sleep tracking, and relaxation techniques. It monitors your sleep environment and provides feedback to improve your rest and morning recovery. Protect your sleep from phone distractions with app blocking features.

**Highlights:** Personalized bedtime routine builder, Sleep Score and insights tracking, Guided relaxation techniques, App blocking for sleep protection, Sleep environment monitoring, Morning energy and recovery feedback, Gamified sleep habit tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SleepStack Pro weekly | $4.99 | per 7 days |
| SleepStack Pro Yearly | $29.99 | per year |
| SleepStack Yearly | $59.99 | per year |


## Frequently asked questions

### Is Somni free?

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

### Is SleepStack free?

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

### Which has better reviews, Somni or SleepStack?

Somni is rated higher. Somni averages 5.0 out of 5 from 2 ratings, while SleepStack averages 4.0 from 4 ratings.

### Do Somni or SleepStack have ads?

Neither Somni nor SleepStack shows ads.

### Which is updated more often, Somni or SleepStack?

Somni ships an update every 4 days, and SleepStack every 10 days. Most recently, Somni was updated on October 7, 2026 and SleepStack on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*