Comparison

One Sudoku vs Intergalactic Algebra

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

One Sudoku

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
Read full description

One Sudoku is the ultimate Sudoku app for your device. It features 11 varieties of Sudoku puzzle types in different sizes* with selectable difficulty levels. Thanks to different input methods, you can solve Sudokus the way it feels best for you. Special events that take place over the course of a year unlock new, exciting puzzle challenges. * All Sudokus featured in this app are 100 % unique - they are created exclusively for One Sudoku * One Sudoku includes an infinite number of Sudokus so the fun will never end * Compare your puzzle-solving skills with other players from all over the world * Unlock achievements * Themed Sudoku events The following puzzles types are included: * Classic (4x4, 9x9, 16x16) * Chaos (7x7 to 12x12) * Stair Steps * Mathdoku (3x3 to 6x6) * Window Club members also get access to: * Jigsaw (7x7, 9x9, 11x11) * Kropki (4x4 and 9x9) * Even / Odd * X-Sudoku * Comparison * Killer Play as many Sudokus as you want. Or join the „One Sudoku Club“ and unlock offline games, all puzzle types, and all difficulties without any ads. Download One Sudoku today - unlimited Sudoku solving fun awaits. *) Note: sizes from 10x10 and above are only available on devices with a larger screen (i.E. iPads). Terms of Use: https://onesudoku.app/terms

About

Intergalactic Algebra

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
Read full description

Introducing Intergalactic Algebra! A collection of algebra games that challenges you to use various math skills in order to solve mathematical problems in order to launch rockets into space! Intergalactic algebra uses Common Core aligned math. (Follows Common Core standard CCSS.MATH.HS.A.SSE.B.3) Now these basic operations can be used to guide rockets into space and accelerate the space race. Try Intergalactic Algebra! Assess proficiency in addition and subtraction, factoring, functions, multiples of ten, number of solutions, quadratics, rates of change, rocket trivia, systems of equations, and word problems. Rewarding levels of gameplay maintain engagement. You will forget you were doing math as you launch rockets into space! You may optionally buy reports in order to analyze what questions were missed. Teachers and parents may find this optional feature particularly useful. In order to purchase one of these reports, the player must create an account so that they can keep track of their reports and watch as they improve their math skills.

Screenshots

One Sudoku4 screens
Intergalactic Algebra4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
One Sudoku versus Intergalactic Algebra: the parameters behind the verdict, then further details
ParameterOne SudokuIntergalactic Algebra
PriceFreeFree
Rating5.0 (3 ratings) — better4.8 (6 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings36 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.013.0 — better
Further details — not scored
Size31 MB280 MB
Age rating4+4+
DeveloperCornelius BehrendIntergalactic Education LLC

Customer experience

One Sudoku

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Intergalactic Algebra

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

One Sudoku

Subscriptions3
  • One Sudoku Club: Monthly$2.491 Month
  • One Sudoku Club Promotion$6.993 Months
  • One Sudoku Club: Yearly$22.991 Year
10 purchases

Intergalactic Algebra

One-time10
  • Factoring Rocket Report$2.99
  • Functions Rocket Report$2.99
  • Addition Subtraction Report$2.99
Show 7 more
  • Multiples of Ten Report$2.99
  • Num Of Solutions Report$2.99
  • Quadratics Rocket Report$2.99
  • Rates of Change Report$2.99
  • Word Problems Rocket Report$2.99
  • Rocket Trivia Rocket Report$2.99
  • Progressions Report$2.99

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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