# Double dummy problems vs DuplicateMobile

The clearest difference is ads: DuplicateMobile at none against Double dummy problems's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Double dummy problems sells 1 one-off in-app purchase and DuplicateMobile sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Double dummy problems ships an update every 3 weeks, DuplicateMobile every 4 weeks. The most recent releases landed on September 9, 2026 and February 5, 2026 respectively.

## The numbers

| Metric | Double dummy problems | DuplicateMobile |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Size | 27 MB | 322 MB |
| Requires iOS | **14.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [丽娜 夏](https://appshunter.io/developer/1084968330) | [Randy Fuller](https://appshunter.io/developer/1385180361) |

## 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 |


### DuplicateMobile

[App page](https://appshunter.io/ios/app/duplicatemobile/id1448730012)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Club | $99.99 | one-time |
| Medium Club | $129.99 | one-time |
| Large Club | $149.99 | one-time |


## Frequently asked questions

### Is Double dummy problems free?

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

### Is DuplicateMobile free?

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

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

Double dummy problems shows ads; DuplicateMobile does not.

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

Double dummy problems ships an update every 3 weeks, and DuplicateMobile every 4 weeks. Most recently, Double dummy problems was updated on September 9, 2026 and DuplicateMobile on February 5, 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.*