# Mathstack vs The Circle Survives

The clearest difference is in-app purchases: The Circle Survives at none against Mathstack's 3. The Circle Survives also leads on update cadence (every 2 days vs every 11 days) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Mathstack sells 3 in-app purchases, starting at $1.99 per 7 days. The Circle Survives asks for nothing beyond the download.

Mathstack ships an update every 11 days, The Circle Survives every 2 days. The most recent releases landed on June 27, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Mathstack | The Circle Survives |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 11 days | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 31 MB | 16 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Hazerim Interactive Entertainment, UAB](https://appshunter.io/developer/1804702752) | [Oleg Kuksa](https://appshunter.io/developer/1888317759) |

## 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 |


### The Circle Survives

[App page](https://appshunter.io/ios/app/the-circle-survives/id6762492567)

**In-app purchases:** none


## Frequently asked questions

### Is Mathstack free?

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

### Is The Circle Survives free?

The Circle Survives is free to download, with no in-app purchases.

### Do Mathstack or The Circle Survives have ads?

Both Mathstack and The Circle Survives show ads.

### Which is updated more often, Mathstack or The Circle Survives?

Mathstack ships an update every 11 days, and The Circle Survives every 2 days. Most recently, Mathstack was updated on June 27, 2026 and The Circle Survives on September 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*