# Stack Number vs Cynus Chess

The clearest difference is ads: Cynus Chess at none against Stack Number's shown. Cynus Chess also leads on update cadence (weekly vs every 24 months). 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.

Stack Number ships an update every 24 months, Cynus Chess weekly. The most recent releases landed on September 16, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Stack Number | Cynus Chess |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/stack-number/id1048071754/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 24 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 17 MB | 46 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [亚州 王](https://appshunter.io/developer/991530214) | [shenzhen didijin technology co., Ltd](https://appshunter.io/developer/1552689874) |

## What reviewers say

### Stack Number

[App page](https://appshunter.io/ios/app/stack-number/id1048071754)

Tap to drop blocks and merge adjacent ones with the same value to create higher numbers. Aim for the highest score possible in this engaging puzzle game.

**Highlights:** Block dropping mechanic, Adjacent block merging, Number value progression, High score pursuit, Simple tap controls

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

**In-app purchases:** none


### Cynus Chess

[App page](https://appshunter.io/ios/app/cynus-chess/id6768563114)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stack Number free?

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

### Is Cynus Chess free?

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

### Do Stack Number or Cynus Chess have ads?

Stack Number shows ads; Cynus Chess does not.

### Which is updated more often, Stack Number or Cynus Chess?

Stack Number ships an update every 24 months, and Cynus Chess weekly. Most recently, Stack Number was updated on September 16, 2026 and Cynus Chess on September 22, 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.*