# WhiteNoise | EchoCalm vs Sleep Effect

The clearest difference is in-app purchases: Sleep Effect at none against WhiteNoise | EchoCalm's 2. Sleep Effect also leads on ads (none vs shown). WhiteNoise | EchoCalm's advantage is iOS requirement (17.6 vs 26.1). On price, update cadence and device support there is nothing between them.

Both are free to download. WhiteNoise | EchoCalm sells 2 in-app purchases, starting at $2.99 per 7 days. Sleep Effect asks for nothing beyond the download.

WhiteNoise | EchoCalm ships an update monthly, Sleep Effect fortnightly. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | WhiteNoise | EchoCalm | Sleep Effect |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Fortnightly** |
| Size | 103 MB | 324 MB |
| Requires iOS | **17.6** | 26.1 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yauhen Shchamialiou](https://appshunter.io/developer/1536717988) | [Ahmed Nabulsi](https://appshunter.io/developer/1863897890) |

## What reviewers say

### WhiteNoise | EchoCalm

[App page](https://appshunter.io/ios/app/whitenoise-echocalm/id6473634800)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $2.99 | per 7 days |
| Monthly Premium | $7.99 | per month |


### 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 WhiteNoise | EchoCalm free?

WhiteNoise | EchoCalm is free to download, with in-app purchases available.

### Is Sleep Effect free?

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

### Do WhiteNoise | EchoCalm or Sleep Effect have ads?

WhiteNoise | EchoCalm shows ads; Sleep Effect does not.

### Which is updated more often, WhiteNoise | EchoCalm or Sleep Effect?

WhiteNoise | EchoCalm ships an update monthly, and Sleep Effect fortnightly. Most recently, WhiteNoise | EchoCalm was updated on November 4, 2026 and Sleep Effect on November 9, 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.*