# FourKeys vs NLPで自分を書き換える３０日

The clearest difference is in-app purchases: NLPで自分を書き換える３０日 at none against FourKeys's 1. NLPで自分を書き換える３０日 also leads on iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. FourKeys sells 1 one-off in-app purchase. NLPで自分を書き換える３０日 asks for nothing beyond the download.

## The numbers

| Metric | FourKeys | NLPで自分を書き換える３０日 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 28 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [敏刚 易](https://appshunter.io/developer/1872259103) | [nakamura hideonri](https://appshunter.io/developer/1878354917) |

## What reviewers say

### FourKeys

[App page](https://appshunter.io/ios/app/fourkeys-sound-button/id6761699602)

Tap large buttons to play funny sound effects instantly. Create custom soundboards with your own recordings or imported audio. Enjoy this satisfying sound toy on your iPhone, Apple Watch, and home screen widget for pranks or stress relief.

**Highlights:** Instant sound effect playback, Customizable soundboards, Record and import audio, iPhone and Apple Watch support, Interactive home screen widget, Shareable keyboard packs

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FourKeys Unlimited | $1.99 | one-time |


### NLPで自分を書き換える３０日

[App page](https://appshunter.io/ios/app/nlp/id6798104619)

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

**In-app purchases:** none


## Frequently asked questions

### Is FourKeys free?

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

### Is NLPで自分を書き換える３０日 free?

NLPで自分を書き換える３０日 is free to download, with no in-app purchases.

### Do FourKeys or NLPで自分を書き換える３０日 have ads?

Neither FourKeys nor NLPで自分を書き換える３０日 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.*