# SleepBytes vs Sleepillow

The clearest difference is update cadence: SleepBytes at every 3 months against Sleepillow's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SleepBytes ships an update every 3 months, Sleepillow every 8 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | SleepBytes | Sleepillow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Size | 66 MB | 135 MB |
| Requires iOS | **10.0** | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SiliconeSignal Technologies](https://appshunter.io/developer/1559911870) | [Hong Kong Playground Association](https://appshunter.io/developer/886115780) |

## What reviewers say

### SleepBytes

[App page](https://appshunter.io/ios/app/sleepbytes/id1660749766)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleepillow

[App page](https://appshunter.io/ios/app/sleepillow/id6450578586)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SleepBytes free?

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

### Is Sleepillow free?

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

### Do SleepBytes or Sleepillow have ads?

Neither SleepBytes nor Sleepillow shows ads.

### Which is updated more often, SleepBytes or Sleepillow?

SleepBytes ships an update every 3 months, and Sleepillow every 8 months. Most recently, SleepBytes was updated on November 7, 2026 and Sleepillow on November 7, 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.*