# UOIN vs Somno

The clearest difference is iOS requirement: UOIN at 14.0 against Somno's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. UOIN sells 1 one-off in-app purchase and Somno sells 6 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UOIN ships an update every 3 weeks, Somno fortnightly. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | UOIN | Somno |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (27 ratings)](https://appshunter.io/ios/app/somno-ai-sleep-tracker/id6504674988/reviews)** |
| Number of ratings | — | **27** |
| Positive reviews | — | 93.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | — | Subscription |
| Size | 120 MB | 50 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Aiyou Digital Intelligence Co., Ltd.](https://appshunter.io/developer/1590480226) | [Remix Design Studio](https://appshunter.io/developer/1708137028) |

## What reviewers say

### UOIN

[App page](https://appshunter.io/ios/app/uoin/id1590480224)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 哑铃课程VIP 高能燃脂健身 | $3.99 | one-time |


### Somno

[App page](https://appshunter.io/ios/app/somno-ai-sleep-tracker/id6504674988)

This app monitors your sleep using AI and smart wearables, providing detailed analysis and science-based improvement plans. It features a smart alarm, nap tracking, and app locking to enhance sleep hygiene. Visualize your sleep patterns and understand how daily habits impact your rest.

**Highlights:** AI sleep analysis and improvement plans, Smart wake-up alarm during light sleep, Accurate nap tracking, App lock for bedtime discipline, Sleep heatmap calendar, Sleep energy score, Automatic sleep tracking with wearables

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Somno Pro Monthly | $3.99 | per month |
| Somno Pro Yearly | $17.99 | per year |
| Somno Pro Yearly | $29.99 | per year |
| Somno Pro Lifetime(Early Bird) | $29.99 | one-time |
| Somno Pro Lifetime(Angel User) | $29.99 | one-time |
| Somno Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is UOIN free?

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

### Is Somno free?

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

### Do UOIN or Somno have ads?

Neither UOIN nor Somno shows ads.

### Which is updated more often, UOIN or Somno?

UOIN ships an update every 3 weeks, and Somno fortnightly. Most recently, UOIN was updated on November 7, 2026 and Somno on November 8, 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.*