Comparison

Intergalactic Algebra vs One By One

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

Head to head
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.

About

One By One

Practice arithmetic, algebra, trigonometry, and calculus with a retro-style math game. Level up by solving problems, unlock new challenges, and compete on leaderboards. Enhance your skills with artifacts and strategic upgrades.

Highlights
  • Randomly generated math problems
  • Leveling system with unlockable content
  • Practice arithmetic, algebra, trigonometry, and calculus
  • Retro ASCII art and music style
  • Leaderboards and achievements
  • Math artifacts and upgrades
  • AI battle mode for targeted practice
Features
Read full description

One By One is a retro math study game built for middle and high school students looking to level up their mental math skills. Featuring randomly generated problems, the app lets you switch from basic arithmetic to advanced calculus. You can also target specific practice areas using the One By One Battles mode or the premium Sandbox mode. Key Features Retro Calculator Aesthetic: Enjoy a nostalgic UI designed with classic Unicode and ASCII art, complete with satisfying mechanical key clicks and atmospheric background music. Four Math Disciplines: Practice everything from basic arithmetic and high school algebra to trigonometric functions (complete with a built-in unit circle) and calculus derivatives. Leveling System: Progress all the way from Level 1 to 99, unlocking brand-new question tiers every ten levels. AI Battles & Training: Test your speed in targeted training modes or race against AI opponents to earn in-game rewards. Artifacts & Upgrades: Solve rare "Golden Problems" to collect 25 unique math artifacts featuring 9 distinct upgrades to shape your strategy. Leaderboards & Achievements: Compete across 5 specialized leaderboards, including a balance-based leaderboard, and uncover hidden achievements. Download One By One and start solving math faster than your teacher! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Intergalactic Algebra4 screens
One By One4 screens

Verdict

The call

The clearest difference is ads: Intergalactic Algebra at none against One By One's shown. Intergalactic Algebra also leads on review sentiment (100% vs 91%) and iOS requirement (13.0 vs 15.0). One By One's advantage is ratings volume (77 vs 6). On price, rating, update cadence and in-app purchases 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. Intergalactic Algebra sells 10 one-off in-app purchases and One By One sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Intergalactic Algebra against 4.8 for One By One. That said, the two scores are not equally well evidenced: One By One has 77 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 100% of Intergalactic Algebra's written reviews are positive against 91% of One By One's.

UpkeepUpdate frequency

Intergalactic Algebra ships an update every 3 weeks, One By One every 2 weeks. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
Intergalactic Algebra versus One By One: the parameters behind the verdict, then further details
ParameterIntergalactic AlgebraOne By One
PriceFreeFree
Rating4.8 (6 ratings) — better4.8 (77 ratings)
Positive reviews100.0% of reviews — better90.9% of reviews
Number of ratings677 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size280 MB64 MB
Age rating4+4+
DeveloperIntergalactic Education LLCBrice Brown

Customer experience

Intergalactic Algebra

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

One By One

All ratings77 ratings
Positive94.8%
Neutral1.3%
Negative3.9%
Written reviews22 reviews
Positive90.9%
Neutral4.5%
Negative4.5%

In-app purchases

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
3 purchases

One By One

Subscriptions2
  • Monthly Support$1.991 Month
  • Yearly Support$12.991 Year
One-time1
  • Lifetime Supporter pass$19.99

Questions

Is Intergalactic Algebra free?
Intergalactic Algebra is free to download, with in-app purchases available.
Is One By One free?
One By One is free to download, with in-app purchases available.
Which has better reviews, Intergalactic Algebra or One By One?
Intergalactic Algebra is rated higher. Intergalactic Algebra averages 4.8 out of 5 from 6 ratings, while One By One averages 4.8 from 77 ratings.
Do Intergalactic Algebra or One By One have ads?
One By One shows ads; Intergalactic Algebra does not.
Which is updated more often, Intergalactic Algebra or One By One?
Intergalactic Algebra ships an update every 3 weeks, and One By One every 2 weeks. Most recently, Intergalactic Algebra was updated on October 9, 2026 and One By One on October 13, 2026.

Other comparisons