# Brain spa(N3) vs Sleep ∞ BGM

Brain spa(N3) and Sleep ∞ BGM are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Brain spa(N3) | Sleep ∞ BGM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Size | 12 MB | 47 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [N.CER Co., Limited](https://appshunter.io/developer/1537925998) | [SHUNJI KUSAKA](https://appshunter.io/developer/1738810004) |

## What reviewers say

### Brain spa(N3)

[App page](https://appshunter.io/ios/app/brain-span3/id6478898385)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleep ∞ BGM

[App page](https://appshunter.io/ios/app/sleep-bgm/id6498901536)

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

**In-app purchases:** none


## Frequently asked questions

### Is Brain spa(N3) free?

Brain spa(N3) is free to download, with no in-app purchases.

### Is Sleep ∞ BGM free?

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

### Do Brain spa(N3) or Sleep ∞ BGM have ads?

Neither Brain spa(N3) nor Sleep ∞ BGM 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.*