# CalmNoise vs CalmStack

The clearest difference is iOS requirement: CalmNoise at 13.0 against CalmStack's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CalmNoise sells 3 in-app purchases, starting at $0.99 per 7 days and CalmStack sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | CalmNoise | CalmStack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | — | Fortnightly |
| Size | 132 MB | 18 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Afriwan Ahda](https://appshunter.io/developer/1330133888) | [EKREM BINGOL](https://appshunter.io/developer/1866041139) |

## What reviewers say

### CalmNoise

[App page](https://appshunter.io/ios/app/calmnoise-sleep-and-focus/id6756897911)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Access | $0.99 | per 7 days |
| Monthly Premium Access | $3.99 | per month |
| Yearly Premium Access | $19.99 | per year |


### CalmStack

[App page](https://appshunter.io/ios/app/calmstack/id6757318937)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $1.99 | per 7 days |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is CalmNoise free?

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

### Is CalmStack free?

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

### Do CalmNoise or CalmStack have ads?

Both CalmNoise and CalmStack show ads.

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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.*