# PG Mahjong vs Stack Order

The clearest difference is in-app purchases: PG Mahjong at none against Stack Order's 2. Stack Order's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Stack Order sells 2 one-off in-app purchases. PG Mahjong asks for nothing beyond the download.

PG Mahjong ships an update every 9 days, Stack Order weekly. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PG Mahjong | Stack Order |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Weekly** |
| Size | 20 MB | 179 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Celtic Wards, LLC](https://appshunter.io/developer/1219544143) | [Gloryway Puzzle](https://appshunter.io/developer/1853465960) |

## What reviewers say

### PG Mahjong

[App page](https://appshunter.io/ios/app/pg-mahjong/id6755306573)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack Order

[App page](https://appshunter.io/ios/app/stack-order-card-sort-games/id6762169694)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NoAds | $7.99 | one-time |
| Ad Free Pack | $12.99 | one-time |


## Frequently asked questions

### Is PG Mahjong free?

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

### Is Stack Order free?

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

### Do PG Mahjong or Stack Order have ads?

PG Mahjong shows ads; Stack Order does not.

### Which is updated more often, PG Mahjong or Stack Order?

PG Mahjong ships an update every 9 days, and Stack Order weekly. Most recently, PG Mahjong was updated on November 9, 2026 and Stack Order on October 31, 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.*