# Amfo vs ホワイトノイズ・環境音・睡眠BGM (音凪)

The clearest difference is ads: Amfo at none against ホワイトノイズ・環境音・睡眠BGM (音凪)'s shown. Amfo also leads on update cadence (every 3 days vs every 6 days) and iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Amfo sells 1 in-app purchase, starting at $7.99 per year and ホワイトノイズ・環境音・睡眠BGM (音凪) sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Amfo ships an update every 3 days, ホワイトノイズ・環境音・睡眠BGM (音凪) every 6 days. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Amfo | ホワイトノイズ・環境音・睡眠BGM (音凪) |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 6 days |
| Size | 54 MB | 179 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Duy Nguyen](https://appshunter.io/developer/1833748259) | [hiroaki suzuki](https://appshunter.io/developer/1477004044) |

## What reviewers say

### Amfo

[App page](https://appshunter.io/ios/app/amfo-ambient-focus-sounds/id6760837672)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Amfo Unlimited | $7.99 | per year |


### ホワイトノイズ・環境音・睡眠BGM (音凪)

[App page](https://appshunter.io/ios/app/bgm/id6766044501)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Otonagi Pro | $3.99 | one-time |


## Frequently asked questions

### Is Amfo free?

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

### Is ホワイトノイズ・環境音・睡眠BGM (音凪) free?

ホワイトノイズ・環境音・睡眠BGM (音凪) is free to download, with in-app purchases available.

### Do Amfo or ホワイトノイズ・環境音・睡眠BGM (音凪) have ads?

ホワイトノイズ・環境音・睡眠BGM (音凪) shows ads; Amfo does not.

### Which is updated more often, Amfo or ホワイトノイズ・環境音・睡眠BGM (音凪)?

Amfo ships an update every 3 days, and ホワイトノイズ・環境音・睡眠BGM (音凪) every 6 days. Most recently, Amfo was updated on October 28, 2026 and ホワイトノイズ・環境音・睡眠BGM (音凪) on November 5, 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.*