# OOS vs 斗地主训练助手

The clearest difference is in-app purchases: OOS at none against 斗地主训练助手's 1. OOS also leads on iOS requirement (11.0 vs 13.0). 斗地主训练助手's advantage is update cadence (every 2 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. 斗地主训练助手 sells 1 in-app purchase, starting at $3.99 per year. OOS asks for nothing beyond the download.

OOS ships an update fortnightly, 斗地主训练助手 every 2 days. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | OOS | 斗地主训练助手 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 17 MB | 56 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [家回 罗](https://appshunter.io/developer/1478554929) | [Shenzhen Tudan E - Commerce Co., Ltd](https://appshunter.io/developer/1832925567) |

## What reviewers say

### OOS

[App page](https://appshunter.io/ios/app/oos/id1617065381)

**Features:** macOS Compatibility

**In-app purchases:** none


### 斗地主训练助手

[App page](https://appshunter.io/ios/app/id6778714755)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 年会员 | $3.99 | per year |


## Frequently asked questions

### Is OOS free?

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

### Is 斗地主训练助手 free?

斗地主训练助手 is free to download, with in-app purchases available.

### Do OOS or 斗地主训练助手 have ads?

Neither OOS nor 斗地主训练助手 shows ads.

### Which is updated more often, OOS or 斗地主训练助手?

OOS ships an update fortnightly, and 斗地主训练助手 every 2 days. Most recently, OOS was updated on October 19, 2026 and 斗地主训练助手 on October 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.*