# One Sudoku vs Intergalactic Algebra

The clearest difference is ads: Intergalactic Algebra at none against One Sudoku's shown. Intergalactic Algebra also leads on update cadence (every 3 weeks vs every 3 months). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. One Sudoku sells 3 in-app purchases, starting at $2.49 per month and Intergalactic Algebra sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

One Sudoku holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

One Sudoku ships an update every 3 months, Intergalactic Algebra every 3 weeks. The most recent releases landed on September 6, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | One Sudoku | Intergalactic Algebra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/one-sudoku/id1495962031/reviews)** | [4.8 (6 ratings)](https://appshunter.io/ios/app/intergalactic-algebra/id1550524246/reviews) |
| Number of ratings | 3 | **6** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 31 MB | 280 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cornelius Behrend](https://appshunter.io/developer/680700119) | [Intergalactic Education LLC](https://appshunter.io/developer/1364648815) |

## What reviewers say

### One Sudoku

[App page](https://appshunter.io/ios/app/one-sudoku/id1495962031)

This app offers a vast collection of Sudoku puzzles with 11 unique types and adjustable difficulty. Engage in special events, compare scores globally, and unlock achievements. A premium club membership provides offline play and access to all puzzle variations without ads.

**Highlights:** 11 Sudoku puzzle types, Selectable difficulty levels, Special themed events, Global player comparisons, Unlockable achievements, Offline play with club membership

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Sudoku Club: Monthly | $2.49 | per month |
| One Sudoku Club Promotion | $6.99 | per 3 months |
| One Sudoku Club: Yearly | $22.99 | per year |


### Intergalactic Algebra

[App page](https://appshunter.io/ios/app/intergalactic-algebra/id1550524246)

Engage with algebra through a collection of space-themed games. Solve mathematical problems to launch rockets and advance your skills. The app aligns with Common Core standards and offers optional reports for progress analysis.

**Highlights:** Algebraic problem-solving, Rocket launching gameplay, Common Core aligned math, Proficiency assessment, Optional progress reports, Rewarding gameplay

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Factoring Rocket Report | $2.99 | one-time |
| Functions Rocket Report | $2.99 | one-time |
| Addition Subtraction Report | $2.99 | one-time |
| Multiples of Ten Report | $2.99 | one-time |
| Num Of Solutions Report | $2.99 | one-time |
| Quadratics Rocket Report | $2.99 | one-time |
| Rates of Change Report | $2.99 | one-time |
| Word Problems Rocket Report | $2.99 | one-time |
| Rocket Trivia Rocket Report | $2.99 | one-time |
| Progressions Report | $2.99 | one-time |


## Frequently asked questions

### Is One Sudoku free?

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

### Is Intergalactic Algebra free?

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

### Which has better reviews, One Sudoku or Intergalactic Algebra?

One Sudoku is rated higher. One Sudoku averages 5.0 out of 5 from 3 ratings, while Intergalactic Algebra averages 4.8 from 6 ratings.

### Do One Sudoku or Intergalactic Algebra have ads?

One Sudoku shows ads; Intergalactic Algebra does not.

### Which is updated more often, One Sudoku or Intergalactic Algebra?

One Sudoku ships an update every 3 months, and Intergalactic Algebra every 3 weeks. Most recently, One Sudoku was updated on September 6, 2026 and Intergalactic Algebra on June 5, 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.*