# Wow Button! vs せみサウンド

Wow Button! and せみサウンド are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases 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. Wow Button! sells 1 one-off in-app purchase and せみサウンド sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Wow Button! | せみサウンド |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Size | 6 MB | 32 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Goro Sato](https://appshunter.io/developer/412448991) | [ATSUSHI CHIBA](https://appshunter.io/developer/1896527641) |

## What reviewers say

### Wow Button!

[App page](https://appshunter.io/ios/app/wow-button/id6465692235)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### せみサウンド

[App page](https://appshunter.io/ios/app/id6794570039)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| セミサウンド Pro | $0.29 | one-time |


## Frequently asked questions

### Is Wow Button! free?

Wow Button! is free to download, with in-app purchases available.

### Is せみサウンド free?

せみサウンド is free to download, with in-app purchases available.

### Do Wow Button! or せみサウンド have ads?

Both Wow Button! and せみサウンド show ads.

### Which is updated more often, Wow Button! or せみサウンド?

Wow Button! ships an update every 2 weeks, and せみサウンド every 2 weeks. Most recently, Wow Button! was updated on September 8, 2026 and せみサウンド on September 10, 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.*