# Sleepzy vs Undoom

The clearest difference is ads: Undoom at none against Sleepzy's shown. Sleepzy's advantage is device support (4 vs 1) and iOS requirement (13.0 vs 16.0). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Sleepzy sells 13 in-app purchases, starting at $3.99 per 7 days and Undoom sells 3 in-app purchases, starting at $8.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 22, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Sleepzy | Undoom |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (22K ratings)](https://appshunter.io/ios/app/sleepzy-sleep-cycle-tracker/id1064910141/reviews)** | — |
| Number of ratings | **22K** | — |
| Positive reviews | 37.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Monetization | Freemium | — |
| Size | 270 MB | 70 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Mosaic S.r.l.](https://appshunter.io/developer/570748343) | [Fabijan Bajo](https://appshunter.io/developer/1049950802) |

## What reviewers say

### Sleepzy

[App page](https://appshunter.io/ios/app/sleepzy-sleep-cycle-tracker/id1064910141)

This smart alarm clock tracks sleep patterns, wakes you gently during your lightest sleep phase, and analyzes sleep quality. It provides insights into sleep debt, offers relaxing sounds to help you unwind, and can sync with health apps for comprehensive data tracking.

**Highlights:** Smart alarm wakes you in lightest sleep phase, Sleep pattern tracking and analysis, Sleep debt and quality monitoring, Relaxing sounds and AI music for sleep, Weekly sleep statistics and insights, Snore detection (Premium feature), Syncs with Apple Health

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleepzy Premium 1 Week | $3.99 | per 7 days |
| Sleepzy Premium 1 Month | $4.99 | per month |
| Sleepzy Premium 1 Week | $4.99 | per 7 days |
| Sleepzy Pro | $4.99 | per 7 days |
| Sleepzy Pro | $4.99 | per 7 days |
| Sleepzy Premium 1 Month | $6.99 | per month |
| Sleepzy Premium 1 Month | $6.99 | per month |
| Sleepzy Pro | $7.99 | per 7 days |
| Sleepzy Premium 3 Months | $9.99 | per 3 months |
| Sleepzy Premium 1 Year | $14.99 | per year |
| Sleepzy Premium 1 Year | $29.99 | per year |
| Sleepzy Premium 1 Year | $69.99 | per year |
| Sleepzy Premium 1 Year | $89.99 | per year |

**What reviewers like**

- 🚀 Effective alarm clock
- 👍 Customizable alarm sounds
- 🌙 Sleep tracking features
- 💤 Gradual wake-up process

**What reviewers complain about**

- 🐛 Inaccurate sleep tracking
- 🔋 Drains phone battery
- 🔒 Privacy concerns with microphone
- 💰 Overly aggressive upselling of premium features

**Reported bugs**

- Alarm not going off as scheduled
- App crashing or freezing
- Inconsistent data recording

**Requested features**

- Integration with other sleep/health apps
- More detailed sleep analysis and insights
- Ability to adjust alarm time range
- Nap tracking and alarm


### Undoom

[App page](https://appshunter.io/ios/app/undoom-stop-doomscrolling/id6757306580)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Undoom Pro (Weekly) | $8.99 | per 7 days |
| Undoom Pro (Monthly) | $9.99 | per month |
| Undoom Pro (Yearly) | $34.99 | per year |


## Frequently asked questions

### Is Sleepzy free?

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

### Is Undoom free?

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

### Do Sleepzy or Undoom have ads?

Sleepzy shows ads; Undoom does not.

### Which is updated more often, Sleepzy or Undoom?

Sleepzy ships an update monthly, and Undoom monthly. Most recently, Sleepzy was updated on October 22, 2026 and Undoom on October 10, 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.*