# Stack Number vs XGap.io

The clearest difference is ads: XGap.io at none against Stack Number's shown. XGap.io also leads on iOS requirement (11.0 vs 15.0). Stack Number's advantage is update cadence (every 24 months vs every 56 months). On price, in-app purchases and device support 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, XGap.io every 56 months. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Stack Number | XGap.io |
| --- | --- | --- |
| 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** | Every 56 months |
| Monetization | Ad-supported | — |
| Size | 17 MB | 47 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [亚州 王](https://appshunter.io/developer/991530214) | [Appulet, Inc](https://appshunter.io/developer/1164224103) |

## 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


### XGap.io

[App page](https://appshunter.io/ios/app/xgapio/id1405811454)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stack Number free?

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

### Is XGap.io free?

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

### Do Stack Number or XGap.io have ads?

Stack Number shows ads; XGap.io does not.

### Which is updated more often, Stack Number or XGap.io?

Stack Number ships an update every 24 months, and XGap.io every 56 months. Most recently, Stack Number was updated on October 3, 2026 and XGap.io on October 4, 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.*