# Sky Stack Builder Game vs NumRush

The clearest difference is iOS requirement: NumRush at 17.0 against Sky Stack Builder Game's 26.2. On price, ads, 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.

## The numbers

| Metric | Sky Stack Builder Game | NumRush |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/numrush-number-games/id6790057293/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Monetization | — | Free |
| Size | 6 MB | 14 MB |
| Requires iOS | 26.2 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [FAITH MWENJE WETOYI](https://appshunter.io/developer/1882932192) | [Elvis Sun](https://appshunter.io/developer/6790057295) |

## What reviewers say

### Sky Stack Builder Game

[App page](https://appshunter.io/ios/app/sky-stack-builder-game/id6760105864)

**Features:** macOS Compatibility

**In-app purchases:** none


### NumRush

[App page](https://appshunter.io/ios/app/numrush-number-games/id6790057293)

Engage in a fast-paced math arcade game where you solve as many problems as possible against the clock. Build combo streaks, compete with friends in challenges and tournaments, and climb the leaderboards. Enjoy instant feedback and a clean, arcade-inspired design.

**Highlights:** Fast-paced math problem solving, Three distinct game modes (Blitz, Surge, Deathless), Combo streak scoring system, Head-to-head challenges with friends, Multi-day tournaments with live leaderboards, Tactile feedback with sound and haptics, Guest play option, no sign-up required

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sky Stack Builder Game free?

Sky Stack Builder Game is free to download, with no in-app purchases.

### Is NumRush free?

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

### Do Sky Stack Builder Game or NumRush have ads?

Neither Sky Stack Builder Game nor NumRush shows ads.

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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.*