# Double dummy problems vs ABT Tournament Series

The clearest difference is in-app purchases: ABT Tournament Series at none against Double dummy problems's 1. ABT Tournament Series also leads on ads (none vs shown). Double dummy problems's advantage is update cadence (every 3 weeks vs every 4 months). On price, device support and iOS requirement there is nothing between them.

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

Double dummy problems ships an update every 3 weeks, ABT Tournament Series every 4 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Double dummy problems | ABT Tournament Series |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 27 MB | 39 MB |
| Requires iOS | **14.1** | 14.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [丽娜 夏](https://appshunter.io/developer/1084968330) | [Stefan Sawynok](https://appshunter.io/developer/1117697792) |

## 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 |


### ABT Tournament Series

[App page](https://appshunter.io/ios/app/abt-tournament-series/id1326073809)

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

**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 ABT Tournament Series free?

ABT Tournament Series is free to download, with no in-app purchases.

### Do Double dummy problems or ABT Tournament Series have ads?

Double dummy problems shows ads; ABT Tournament Series does not.

### Which is updated more often, Double dummy problems or ABT Tournament Series?

Double dummy problems ships an update every 3 weeks, and ABT Tournament Series every 4 months. Most recently, Double dummy problems was updated on October 26, 2026 and ABT Tournament Series on October 25, 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.*