Comparison

The Dojo vs Oyster | Middle School Math

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

The Dojo

Features
Read full description

I built this app because I thought I was bad at math. I wasn't. I was just never taught properly. The Dojo takes you from actual zero β€” place value, the four operations β€” all the way to equations, geometry and beyond. One idea at a time, in plain words, with zero jargon: every technical word is explained the moment it appears, always. HOW IT WORKS β€’ 10 minutes a day. That's the whole deal. Consistency beats talent β€” it's brain science, and the first lesson explains why. β€’ Read one idea, then prove it. Every lesson teaches ONE thing, then a short quiz confirms you own it. Miss a question? Perfect: a mistake is the exact moment your brain learns. β€’ Spaced repetition, done for you. The app knows when you're about to forget something and brings it back right before β€” you never cram. β€’ A boss at the end of every module, to prove it stuck. From numbers to equations and geometry β€” and the curriculum keeps being written, at no extra cost. INSTRUMENTS YOU CAN TOUCH Math you can grab: a number line you drag, pizza slices you cut, an equation balance that really tips when you cheat, a living triangle that recomputes area, angles and Pythagoras under your finger. And a calculator that GROWS: it only learns a button once you've proven you can do the operation in your head. NO SHAME, EVER No red screams, no guilt trips, no "you lost your streak" drama. An "I'm lost" button that always gives you exactly one next step. A gentle plan when you come back after a break. This app was built by someone who had to start over as an adult β€” it treats you like the capable person you are. ALSO INSIDE β€’ Physics without formulas: measure, compare, estimate the real world β€’ Learn to code and learn to cook β€” free explorations that secretly train the same math muscles β€’ Logic riddles, a Sunday enigma, mock exams, printable worksheets β€’ Works 100 % offline. Your data never leaves your phone. No account, no tracking, nothing to sign up for. FREE & PREMIUM Chapter I of every subject is fully free, uncapped, forever. Past that nothing locks: you keep going, at the daily pace the Dojo recommends, ten minutes a day. The Pass lifts that ceiling, for anyone catching up β€” an exam, going back to school. Nothing is ever locked away β€” only the pace changes. You were never bad at math. Come see for yourself β€” your first win is 60 seconds away. Subscription: The Dojo Pass, monthly or yearly, auto-renewing. Payment is charged to your Apple Account at confirmation of purchase. It renews automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel it in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://effervescent-bienenstitch-4e1aec.netlify.app/confidentialite.html

About

Oyster | Middle School Math

Read full description

OYSTER TURNS MATH FROM A LIST OF ASSIGNMENTS INTO A JOURNEY WORTH EXPLORING. Designed for Grades 5–8, Oyster helps students discover what’s coming next in math before they meet it in class. With a clear learning path, 4,000+ teacher-created interactive activities, and a game-like galaxy to explore, students always know what to learn, practice, and improve next. FLIPPED LEARNING: Learn before class. Practice with purpose. See yourself improve. WITH OYSTER, STUDENTS CAN: * Explore upcoming math topics before class and walk in prepared * Build skills across numbers, fractions, algebra, geometry, measurement, data, and probability * Learn by doing with number lines, matching, drawing, model building, object hunts, visual problem solving, and more * Turn daily practice into a habit with missions, streaks, rewards, and badges * Revisit challenging concepts and strengthen skills that need more practice * See progress across different math abilities with the Skill Crystal * Explore six unique worlds, unlock new avatars, and choose their own captain * Learn in an ad-free environment designed to keep the focus on math FOR PARENTS, OYSTER MAKES PROGRESS EASIER TO UNDERSTAND. See topic-by-topic progress, strengths, areas that need more practice, streaks, and achievements in one place. Daily time limits help families keep learning routines balanced. OYSTER PREMIUM Start for free and upgrade when you’re ready. Premium includes access to the full learning journey, unlimited energy, and exclusive avatars. Eligible users can start with a 7-day free trial. Payment is charged to the App Store account for the selected plan. The subscription renews automatically unless canceled at least 24 hours before the end of the current billing period. Subscriptions can be managed or canceled in App Store account settings. PRIVACY POLICY: [https://getoyster.app/en/privacy](https://getoyster.app/en/privacy) TERMS OF USE: [https://www.apple.com/legal/internet-services/itunes/dev/stdeula/](https://www.apple.com/legal/internet-services/itunes/dev/stdeula/)

Screenshots

The Dojo4 screens
Oyster | Middle School Math4 screens

Verdict

The call

The clearest difference is update cadence: Oyster | Middle School Math at every 10 days against The Dojo's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. The Dojo sells 2 in-app purchases, starting at $11.99 per month and Oyster | Middle School Math sells 2 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

The Dojo ships an update every 3 weeks, Oyster | Middle School Math every 10 days. The most recent releases landed on October 20, 2026 and October 1, 2026 respectively.

Scorecard1 real difference Β· 5 level
The Dojo versus Oyster | Middle School Math: the parameters behind the verdict, then further details
ParameterThe DojoOyster | Middle School Math
PriceFreeFree
Update frequencyEvery 3 weeksEvery 10 days β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 β€” better17.2
Further details β€” not scored
Size4 MB70 MB
Age rating4+4+
DeveloperTomas Alves PereiraBulvar.co Limited

In-app purchases

2 purchases

The Dojo

Subscriptions2
  • The Pass Β· 1 month$11.991 Month
  • The Pass Β· 1 year$95.991 Year
2 purchases

Oyster | Middle School Math

Subscriptions2
  • Oyster Premium (Monthly)7 Days trial$19.991 Month
  • Oyster Premium (Yearly)7 Days trial$129.001 Year

Questions

Is The Dojo free?
The Dojo is free to download, with in-app purchases available.
Is Oyster | Middle School Math free?
Oyster | Middle School Math is free to download, with in-app purchases available.
Do The Dojo or Oyster | Middle School Math have ads?
Neither The Dojo nor Oyster | Middle School Math shows ads.
Which is updated more often, The Dojo or Oyster | Middle School Math?
The Dojo ships an update every 3 weeks, and Oyster | Middle School Math every 10 days. Most recently, The Dojo was updated on October 20, 2026 and Oyster | Middle School Math on October 1, 2026.

Other comparisons