# UFOクリッカー vs 石臼2

The clearest difference is in-app purchases: 石臼2 at none against UFOクリッカー's 7. 石臼2 also leads on device support (3 vs 1) and iOS requirement (14.0 vs 18.6). UFOクリッカー's advantage is update cadence (every 3 days vs every 2 months). On price and ads there is nothing between them.

Both are free to download. UFOクリッカー sells 7 one-off in-app purchases. 石臼2 asks for nothing beyond the download.

UFOクリッカー ships an update every 3 days, 石臼2 every 2 months. The most recent releases landed on September 18, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | UFOクリッカー | 石臼2 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 73 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Masamichi Nakada](https://appshunter.io/developer/1616494891) | [Hirokazu Oshimo](https://appshunter.io/developer/1627742277) |

## What reviewers say

### UFOクリッカー

[App page](https://appshunter.io/ios/app/ufo/id6762073469)

Become an alien and abduct humans in this deep idle clicker game. Expand your galactic empire by upgrading your UFO and unlocking new dimensions. Enjoy endless progression and challenges.

**Highlights:** Abduct humans as an alien, Upgrade UFO and unlock dimensions, Reincarnation system for exponential growth, Challenge modes for deeper gameplay, Achievements and upgrades, Incremental progression

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| スターターパック | $1.99 | one-time |
| エクスプローラーパック | $3.99 | one-time |
| サポーターパック | $4.99 | one-time |
| コマンダーパック | $9.99 | one-time |
| アドミラルパック | $19.99 | one-time |
| フラグシップパック | $59.99 | one-time |
| マザーシップパック | $99.99 | one-time |


### 石臼2

[App page](https://appshunter.io/ios/app/2-ishiusu2/id6770004494)

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

**In-app purchases:** none


## Frequently asked questions

### Is UFOクリッカー free?

UFOクリッカー is free to download, with in-app purchases available.

### Is 石臼2 free?

石臼2 is free to download, with no in-app purchases.

### Do UFOクリッカー or 石臼2 have ads?

Both UFOクリッカー and 石臼2 show ads.

### Which is updated more often, UFOクリッカー or 石臼2?

UFOクリッカー ships an update every 3 days, and 石臼2 every 2 months. Most recently, UFOクリッカー was updated on September 18, 2026 and 石臼2 on August 19, 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.*