# iSleeper vs Kitten Sleep

The clearest difference is rating: Kitten Sleep at 4.8 against iSleeper's 3.3. Kitten Sleep also leads on update cadence (every 9 days vs every 3 weeks) and review sentiment (100% vs 89%). iSleeper's advantage is ads (none vs shown). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. iSleeper sells 3 in-app purchases, starting at $1.99 per month and Kitten Sleep sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Kitten Sleep holds the better App Store score, 4.8 against 3.3. Both are backed by a comparable volume of ratings — 7 and 15 respectively. Written reviews point the same way: 89% of iSleeper's written reviews are positive against 100% of Kitten Sleep's.

iSleeper ships an update every 3 weeks, Kitten Sleep every 9 days. The most recent releases landed on September 22, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | iSleeper | Kitten Sleep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (7 ratings)](https://appshunter.io/ios/app/isleeper-sleep-tracker/id1622341132/reviews) | **[4.8 (15 ratings)](https://appshunter.io/ios/app/kitten-sleep/id6739670508/reviews)** |
| Number of ratings | 7 | **15** |
| Positive reviews | 89.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 72 MB | 54 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [镇坚 陈](https://appshunter.io/developer/1086447259) | [丽 郝](https://appshunter.io/developer/1792664730) |

## What reviewers say

### iSleeper

[App page](https://appshunter.io/ios/app/isleeper-sleep-tracker/id1622341132)

This app monitors sleep cycles and records sleep sounds using neural network algorithms. It features a smart alarm clock with light sleep wake-up and voice control, and provides comprehensive sleep statistics. Recordings are stored locally for privacy.

**Highlights:** Sleep cycle analysis, Snore and sleep talk recording, Smart alarm with light sleep wake-up, Voice control for snooze, Comprehensive sleep statistics, Automatic sleep tracking with Apple Watch

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $9.99 | per year |
| Lifetime Pro | $24.99 | one-time |


### Kitten Sleep

[App page](https://appshunter.io/ios/app/kitten-sleep/id6739670508)

Effortlessly track your sleep without wearables using just your phone. Gain insights into sleep patterns, receive personalized AI scores, and monitor 30-day trends to improve sleep quality. Data is kept private and local.

**Highlights:** Automatic sleep tracking without wearables, Zero battery drain technology, Contact-free sleep analysis, Visualized sleep duration reports, AI Sleep Score, 30-day sleep trend analysis, 100% local data privacy

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthly subscription | $2.99 | per month |
| Subscribe continuously  1 year | $9.99 | per year |


## Frequently asked questions

### Is iSleeper free?

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

### Is Kitten Sleep free?

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

### Which has better reviews, iSleeper or Kitten Sleep?

Kitten Sleep is rated higher. iSleeper averages 3.3 out of 5 from 7 ratings, while Kitten Sleep averages 4.8 from 15 ratings.

### Do iSleeper or Kitten Sleep have ads?

Kitten Sleep shows ads; iSleeper does not.

### Which is updated more often, iSleeper or Kitten Sleep?

iSleeper ships an update every 3 weeks, and Kitten Sleep every 9 days. Most recently, iSleeper was updated on September 22, 2026 and Kitten Sleep on September 14, 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.*