# Mahjong Sort vs Deck 21

The clearest difference is ads: Deck 21 at none against Mahjong Sort's shown. Deck 21 also leads on update cadence (daily vs every 3 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Mahjong Sort ships an update every 3 days, Deck 21 daily. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Mahjong Sort | Deck 21 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | **Daily** |
| Size | 18 MB | 74 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [玉娥 李](https://appshunter.io/developer/1710233000) | [Andre Salvador](https://appshunter.io/developer/1584863518) |

## What reviewers say

### Mahjong Sort

[App page](https://appshunter.io/ios/app/mahjong-sort/id6740538759)

**Features:** macOS Compatibility

**In-app purchases:** none


### Deck 21

[App page](https://appshunter.io/ios/app/deck-21/id6743880049)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mahjong Sort free?

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

### Is Deck 21 free?

Deck 21 is free to download, with no in-app purchases.

### Do Mahjong Sort or Deck 21 have ads?

Mahjong Sort shows ads; Deck 21 does not.

### Which is updated more often, Mahjong Sort or Deck 21?

Mahjong Sort ships an update every 3 days, and Deck 21 daily. Most recently, Mahjong Sort was updated on September 14, 2026 and Deck 21 on September 9, 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.*