# Amazing Machine vs Sena Arcade

The clearest difference is in-app purchases: Amazing Machine at none against Sena Arcade's 8. Sena Arcade's advantage is update cadence (every 8 months vs every 30 months) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Sena Arcade sells 8 one-off in-app purchases. Amazing Machine asks for nothing beyond the download.

Amazing Machine ships an update every 30 months, Sena Arcade every 8 months. The most recent releases landed on October 18, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Amazing Machine | Sena Arcade |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 30 months | **Every 8 months** |
| Size | 147 MB | 178 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kuo Hsiung Chiu](https://appshunter.io/developer/1556190718) | [YONG GYUN IM](https://appshunter.io/developer/1572982644) |

## What reviewers say

### Amazing Machine

[App page](https://appshunter.io/ios/app/amazing-machine-brain-puzzle/id1566588053)

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

**In-app purchases:** none


### Sena Arcade

[App page](https://appshunter.io/ios/app/sena-arcade-bumpy/id1572982642)

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30 Coin | $0.99 | one-time |
| 65 Coin | $1.99 | one-time |
| Hanbok A | $2.99 | one-time |
| Hanbok B | $2.99 | one-time |
| Maid A | $2.99 | one-time |
| Maid B | $2.99 | one-time |
| 170 Coin | $4.99 | one-time |
| 360 Coin | $9.99 | one-time |


## Frequently asked questions

### Is Amazing Machine free?

Amazing Machine is free to download, with no in-app purchases.

### Is Sena Arcade free?

Sena Arcade is free to download, with in-app purchases available.

### Do Amazing Machine or Sena Arcade have ads?

Both Amazing Machine and Sena Arcade show ads.

### Which is updated more often, Amazing Machine or Sena Arcade?

Amazing Machine ships an update every 30 months, and Sena Arcade every 8 months. Most recently, Amazing Machine was updated on October 18, 2026 and Sena Arcade on October 4, 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.*