# Numbers Sigma Puzzle vs MindChess

The clearest difference is rating: MindChess at 5.0 against Numbers Sigma Puzzle's 1.0. MindChess also leads on ads (none vs shown) and update cadence (every 3 months vs every 26 months). Numbers Sigma Puzzle's advantage is in-app purchases (none vs 2) and iOS requirement (8.1 vs 18.0). On price, ratings volume and device support there is nothing between them.

Both are free to download. MindChess sells 2 in-app purchases, starting at $0.99 per month. Numbers Sigma Puzzle asks for nothing beyond the download.

MindChess holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Numbers Sigma Puzzle ships an update every 26 months, MindChess every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Numbers Sigma Puzzle | MindChess |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/numbers-sigma-puzzle/id1292171380/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mindchess/id6745103930/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 26 months | **Every 3 months** |
| Monetization | **Ad-supported** | Freemium |
| Size | 67 MB | 140 MB |
| Requires iOS | **8.1** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Ruslan Goncharenko](https://appshunter.io/developer/934710362) | [omar megdadi](https://appshunter.io/developer/589920371) |

## What reviewers say

### Numbers Sigma Puzzle

[App page](https://appshunter.io/ios/app/numbers-sigma-puzzle/id1292171380)

A minimalistic math puzzle game where players must find the correct number combinations to solve grid-based challenges. Remove redundant numbers so that the sum of remaining numbers in each row and column matches the targets. Offers 5000 levels across various grid sizes.

**Highlights:** Minimalistic math puzzle gameplay, Find number combinations, Remove redundant numbers, Row and column sum matching, Lock numbers for easier solving, 5000 levels across 5 grid sizes

**Features:** macOS Compatibility

**In-app purchases:** none


### MindChess

[App page](https://appshunter.io/ios/app/mindchess/id6745103930)

This app offers daily chess training designed to enhance mental visualization and blindfold play. It features mini-games that improve calculation, memory, and concentration, inspired by grandmaster training methods. Practice exercises focus on board elements without needing a physical board.

**Highlights:** Mental visualization training, Blindfold chess practice, Calculation and memory improvement, Concentration exercises, Mini-games inspired by grandmasters, Progress tracking

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $0.99 | per month |
| Yearly subscription | $9.99 | per year |


## Frequently asked questions

### Is Numbers Sigma Puzzle free?

Numbers Sigma Puzzle is free to download, with no in-app purchases.

### Is MindChess free?

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

### Which has better reviews, Numbers Sigma Puzzle or MindChess?

MindChess is rated higher. Numbers Sigma Puzzle averages 1.0 out of 5 from 1 ratings, while MindChess averages 5.0 from 1 ratings.

### Do Numbers Sigma Puzzle or MindChess have ads?

Numbers Sigma Puzzle shows ads; MindChess does not.

### Which is updated more often, Numbers Sigma Puzzle or MindChess?

Numbers Sigma Puzzle ships an update every 26 months, and MindChess every 3 months. Most recently, Numbers Sigma Puzzle was updated on October 24, 2026 and MindChess on October 24, 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.*