# Rotablock Puzzle vs Projectile Arrow Cal

The clearest difference is update cadence: Rotablock Puzzle at every 4 days against Projectile Arrow Cal's every 4 months. Rotablock Puzzle also leads on iOS requirement (12.0 vs 15.6). 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.

Rotablock Puzzle ships an update every 4 days, Projectile Arrow Cal every 4 months. The most recent releases landed on November 9, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Rotablock Puzzle | Projectile Arrow Cal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Size | 65 MB | 13 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [鹏 欧阳](https://appshunter.io/developer/1866560031) | [思近 李](https://appshunter.io/developer/1866520615) |

## What reviewers say

### Rotablock Puzzle

[App page](https://appshunter.io/ios/app/rotablock-puzzle/id6757733830)

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

**In-app purchases:** none


### Projectile Arrow Cal

[App page](https://appshunter.io/ios/app/projectile-arrow-cal/id6757831887)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rotablock Puzzle free?

Rotablock Puzzle is free to download, with no in-app purchases.

### Is Projectile Arrow Cal free?

Projectile Arrow Cal is free to download, with no in-app purchases.

### Do Rotablock Puzzle or Projectile Arrow Cal have ads?

Neither Rotablock Puzzle nor Projectile Arrow Cal shows ads.

### Which is updated more often, Rotablock Puzzle or Projectile Arrow Cal?

Rotablock Puzzle ships an update every 4 days, and Projectile Arrow Cal every 4 months. Most recently, Rotablock Puzzle was updated on November 9, 2026 and Projectile Arrow Cal on October 28, 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.*