# プロセス・ディフェンス vs PRIME DROP

The clearest difference is in-app purchases: プロセス・ディフェンス at none against PRIME DROP's 1. プロセス・ディフェンス also leads on update cadence (weekly vs every 3 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. PRIME DROP sells 1 one-off in-app purchase. プロセス・ディフェンス asks for nothing beyond the download.

プロセス・ディフェンス ships an update weekly, PRIME DROP every 3 weeks. The most recent releases landed on October 9, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | プロセス・ディフェンス | PRIME DROP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 81 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chikai Ito](https://appshunter.io/developer/1480561746) | [KANTA KOKONNO](https://appshunter.io/developer/6800746480) |

## What reviewers say

### プロセス・ディフェンス

[App page](https://appshunter.io/ios/app/id1592811050)

**Features:** macOS Compatibility

**In-app purchases:** none


### PRIME DROP

[App page](https://appshunter.io/ios/app/prime-drop/id6805800981)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is プロセス・ディフェンス free?

プロセス・ディフェンス is free to download, with no in-app purchases.

### Is PRIME DROP free?

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

### Do プロセス・ディフェンス or PRIME DROP have ads?

Both プロセス・ディフェンス and PRIME DROP show ads.

### Which is updated more often, プロセス・ディフェンス or PRIME DROP?

プロセス・ディフェンス ships an update weekly, and PRIME DROP every 3 weeks. Most recently, プロセス・ディフェンス was updated on October 9, 2026 and PRIME DROP on October 26, 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.*