# Sudoku Kids vs Mathstack

The clearest difference is price: Mathstack at Free against Sudoku Kids's $1.99. Mathstack also leads on rating (5.0 vs 3.0) and update cadence (every 11 days vs every 120 months). Sudoku Kids's advantage is in-app purchases (none vs 3) and ads (none vs shown). On ratings volume, device support and iOS requirement there is nothing between them.

Mathstack is free to download; Sudoku Kids costs $1.99 up front. Mathstack sells 3 in-app purchases, starting at $1.99 per 7 days. Sudoku Kids asks for nothing beyond the download.

Mathstack holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Sudoku Kids ships an update every 120 months, Mathstack every 11 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sudoku Kids | Mathstack |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/sudoku-kids/id802421876/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mathstack-sequence-puzzle/id6748113494/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 120 months | **Every 11 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 17 MB | 31 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [CHHB](https://appshunter.io/developer/434055540) | [Hazerim Interactive Entertainment, UAB](https://appshunter.io/developer/1804702752) |

## What reviewers say

### Sudoku Kids

[App page](https://appshunter.io/ios/app/sudoku-kids/id802421876)

This game introduces children aged 4 and up to the logic of Sudoku with a simplified 4x4 grid. It offers rewards for correct solutions and features unlockable levels to playfully enhance attention and concentration. The experience is ad-free and free of in-app purchases, focusing on success without time pressure.

**Highlights:** Simplified 4x4 Sudoku grid, Rewards for correct solutions, Unlockable levels with new tasks, Promotes attention and concentration, Ad-free and no in-app purchases, No time pressure, Visual representations

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Sudoku Kids free?

Sudoku Kids costs $1.99, with no in-app purchases.

### Is Mathstack free?

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

### Which has better reviews, Sudoku Kids or Mathstack?

Mathstack is rated higher. Sudoku Kids averages 3.0 out of 5 from 2 ratings, while Mathstack averages 5.0 from 1 ratings.

### Do Sudoku Kids or Mathstack have ads?

Mathstack shows ads; Sudoku Kids does not.

### Which is updated more often, Sudoku Kids or Mathstack?

Sudoku Kids ships an update every 120 months, and Mathstack every 11 days. Most recently, Sudoku Kids was updated on November 1, 2026 and Mathstack on October 30, 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.*