# Rain Synth vs Sleep Effect

The clearest difference is update cadence: Rain Synth at every 4 days against Sleep Effect's fortnightly. Rain Synth also leads on iOS requirement (15.0 vs 26.1). 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.

Rain Synth ships an update every 4 days, Sleep Effect fortnightly. Both last shipped on October 25, 2026.

## The numbers

| Metric | Rain Synth | Sleep Effect |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 2 MB | 324 MB |
| Requires iOS | **15.0** | 26.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kaine Shutler](https://appshunter.io/developer/1889281429) | [Ahmed Nabulsi](https://appshunter.io/developer/1863897890) |

## What reviewers say

### Rain Synth

[App page](https://appshunter.io/ios/app/rain-synth-sleep-sounds/id6761389583)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleep Effect

[App page](https://appshunter.io/ios/app/sleep-effect/id6762162467)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rain Synth free?

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

### Is Sleep Effect free?

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

### Do Rain Synth or Sleep Effect have ads?

Neither Rain Synth nor Sleep Effect shows ads.

### Which is updated more often, Rain Synth or Sleep Effect?

Rain Synth ships an update every 4 days, and Sleep Effect fortnightly. Most recently, Rain Synth was updated on October 25, 2026 and Sleep Effect on October 25, 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.*