# Mathstack vs Sky Run

The clearest difference is device support: Sky Run at 3 against Mathstack's 1. Sky Run also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Mathstack sells 3 in-app purchases, starting at $1.99 per 7 days and Sky Run sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Mathstack ships an update every 11 days, Sky Run weekly. The most recent releases landed on June 27, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Mathstack | Sky Run |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mathstack-sequence-puzzle/id6748113494/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 11 days | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 31 MB | 331 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Hazerim Interactive Entertainment, UAB](https://appshunter.io/developer/1804702752) | [JIN HWAN KIM](https://appshunter.io/developer/576623931) |

## What reviewers say

### Mathstack

[App page](https://appshunter.io/ios/app/mathstack-sequence-puzzle/id6748113494)

A unique number puzzle game where you stack cards to form sequences. Strategically use temporary slots to clear the board and uncover hidden cards. Offers three difficulty levels for a tailored challenge.

**Highlights:** Sequence building gameplay, Strategic card stacking, Temporary slot management, Three difficulty levels, Uncover hidden cards

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads (Weekly) | $1.99 | per 7 days |
| No Ads (Monthly) | $5.99 | per month |
| No Ads (Lifetime) | $19.99 | one-time |


### Sky Run

[App page](https://appshunter.io/ios/app/sky-run-geometry-jump/id6749869934)

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aveline | $2.99 | one-time |
| Isabeau | $2.99 | one-time |
| Rowena | $2.99 | one-time |
| Lyra | $2.99 | one-time |
| Arwen | $3.99 | one-time |
| Coraline | $3.99 | one-time |
| Selene | $3.99 | one-time |
| Zinnia | $4.99 | one-time |


## Frequently asked questions

### Is Mathstack free?

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

### Is Sky Run free?

Sky Run is free to download, with in-app purchases available.

### Do Mathstack or Sky Run have ads?

Both Mathstack and Sky Run show ads.

### Which is updated more often, Mathstack or Sky Run?

Mathstack ships an update every 11 days, and Sky Run weekly. Most recently, Mathstack was updated on June 27, 2026 and Sky Run on September 14, 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.*