# Selkey（シェルキー） vs プロストック

The clearest difference is update cadence: Selkey（シェルキー） at every 2 months against プロストック's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Selkey（シェルキー） ships an update every 2 months, プロストック every 7 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Selkey（シェルキー） | プロストック |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Size | 24 MB | 93 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Seltech Co.,Ltd.](https://appshunter.io/developer/1473568121) | [KOIZUMI Co.,LTD.](https://appshunter.io/developer/1687046161) |

## What reviewers say

### Selkey（シェルキー）

[App page](https://appshunter.io/ios/app/selkey/id1513884253)

**Features:** macOS Compatibility

**In-app purchases:** none


### プロストック

[App page](https://appshunter.io/ios/app/id6470243222)

**In-app purchases:** none


## Frequently asked questions

### Is Selkey（シェルキー） free?

Selkey（シェルキー） is free to download, with no in-app purchases.

### Is プロストック free?

プロストック is free to download, with no in-app purchases.

### Do Selkey（シェルキー） or プロストック have ads?

Neither Selkey（シェルキー） nor プロストック shows ads.

### Which is updated more often, Selkey（シェルキー） or プロストック?

Selkey（シェルキー） ships an update every 2 months, and プロストック every 7 months. Most recently, Selkey（シェルキー） was updated on October 27, 2026 and プロストック on October 30, 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.*