# One Calm vs 奇妙FM

The clearest difference is in-app purchases: One Calm at none against 奇妙FM's 3. 奇妙FM's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. 奇妙FM sells 3 in-app purchases, starting at $0.99 per month. One Calm asks for nothing beyond the download.

## The numbers

| Metric | One Calm | 奇妙FM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fm/id6450441150/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 months |
| Monetization | — | Freemium |
| Size | 14 MB | 36 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [潘安 吴](https://appshunter.io/developer/1681541749) | [迎祥 范](https://appshunter.io/developer/1536256199) |

## What reviewers say

### One Calm

[App page](https://appshunter.io/ios/app/one-calm/id6447800103)

**Features:** macOS Compatibility

**In-app purchases:** none


### 奇妙FM

[App page](https://appshunter.io/ios/app/fm/id6450441150)

This app offers a minimalist, retro-style collection of white noise and meditation sounds designed to aid sleep, focus, and relaxation. It allows users to create personalized soundscapes by combining various natural sounds, with features like timed shut-off and volume control for a comfortable listening experience.

**Highlights:** Diverse white noise and nature sounds, Customizable sound combinations, Timed shut-off function, Flexible volume adjustment, Minimalist retro design, Enhances focus and relaxation

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FM Plus Monthly Subscription | $0.99 | per month |
| FM Plus Annual Subscription | $2.99 | per year |
| FM Plus Permanent Member | $1.99 | one-time |


## Frequently asked questions

### Is One Calm free?

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

### Is 奇妙FM free?

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

### Do One Calm or 奇妙FM have ads?

Neither One Calm nor 奇妙FM shows 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.*