# Sleepzy vs zZz

The clearest difference is rating: Sleepzy at 4.3 against zZz's 2.9. Sleepzy also leads on review sentiment (37% vs 0%) and ratings volume (22K vs 11). zZz's advantage is ads (none vs shown) and update cadence (every 4 days vs monthly). On price, in-app purchases and monetization model there is nothing between them.

Both are free to download. Sleepzy sells 13 in-app purchases, starting at $3.99 per 7 days and zZz sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sleepzy holds the better App Store score, 4.3 against 2.9. That said, the two scores are not equally well evidenced: Sleepzy has 22K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 37% of Sleepzy's written reviews are positive against 0% of zZz's.

Sleepzy ships an update monthly, zZz every 4 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sleepzy | zZz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (22K ratings)](https://appshunter.io/ios/app/sleepzy-sleep-cycle-tracker/id1064910141/reviews)** | [2.9 (11 ratings)](https://appshunter.io/ios/app/zzz-sleep-tracker-widget/id1586436109/reviews) |
| Number of ratings | **22K** | 11 |
| Positive reviews | **37.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 270 MB | 6 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Mosaic S.r.l.](https://appshunter.io/developer/570748343) | [Florian Schweizer](https://appshunter.io/developer/1142213239) |

## 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


### zZz

[App page](https://appshunter.io/ios/app/zzz-sleep-tracker-widget/id1586436109)

Easily log your sleep with a single tap using home or lock screen widgets. Track time in bed, awake time, and actual sleep duration, syncing data with Apple Health for insightful analysis.

**Highlights:** One-tap sleep logging, Home and lock screen widgets, Tracks time in bed, awake, and sleep, Syncs with Apple Health, Siri and Shortcuts integration

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Tier | $0.99 | one-time |


## Frequently asked questions

### Is Sleepzy free?

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

### Is zZz free?

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

### Which has better reviews, Sleepzy or zZz?

Sleepzy is rated higher. Sleepzy averages 4.3 out of 5 from 22K ratings, while zZz averages 2.9 from 11 ratings.

### Do Sleepzy or zZz have ads?

Sleepzy shows ads; zZz does not.

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

Sleepzy ships an update monthly, and zZz every 4 days. Most recently, Sleepzy was updated on October 28, 2026 and zZz on October 24, 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.*