# Double dummy problems vs ALPHA_WALL

The clearest difference is in-app purchases: ALPHA_WALL at none against Double dummy problems's 1. ALPHA_WALL also leads on ads (none vs shown) and iOS requirement (12.0 vs 14.1). On price, update cadence and device support there is nothing between them.

Both are free to download. Double dummy problems sells 1 one-off in-app purchase. ALPHA_WALL asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 9, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Double dummy problems | ALPHA_WALL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 27 MB | 74 MB |
| Requires iOS | 14.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [丽娜 夏](https://appshunter.io/developer/1084968330) | [宁波昂赛体育发展有限公司](https://appshunter.io/developer/1558080155) |

## What reviewers say

### Double dummy problems

[App page](https://appshunter.io/ios/app/double-dummy-problems/id1013055806)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| You will pay to remove ads. | $1.99 | one-time |


### ALPHA_WALL

[App page](https://appshunter.io/ios/app/alpha-wall/id1558080153)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Double dummy problems free?

Double dummy problems is free to download, with in-app purchases available.

### Is ALPHA_WALL free?

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

### Do Double dummy problems or ALPHA_WALL have ads?

Double dummy problems shows ads; ALPHA_WALL does not.

### Which is updated more often, Double dummy problems or ALPHA_WALL?

Double dummy problems ships an update every 3 weeks, and ALPHA_WALL every 3 weeks. Most recently, Double dummy problems was updated on September 9, 2026 and ALPHA_WALL on September 14, 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.*