Comparison

Grade 9 Math Mastery vs Peras

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

Head to head
About

Grade 9 Math Mastery

Features
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Grade 9 Math Mastery prepares Ontario students for the province-wide Grade 9 mathematics assessment. It teaches each concept first, then gives 400 practice questions to prove it stuck. Most study apps only test. This one teaches. Learn the concept • 25 guided lessons, one for every topic on the course • Worked examples that reveal one step at a time, so students can attempt the next line before seeing it • Each lesson names the mistakes students actually make, and why they happen • A short check at the end confirms the idea landed Practise until it sticks • 400 questions across all five strands: Number, Algebra, Data, Geometry and Measurement, and Financial Literacy • Difficulty adapts to the student and moves up as they improve • Wrong answers come back automatically on a spaced repetition schedule, timed for just before they would be forgotten • A mistake journal collects everything missed, with step-by-step solutions • A 57-formula reference sheet, plus a quiz mode for memorising it Practise under real conditions • Mini and full mock tests, timed • A full exam simulation: 25 questions, 75 minutes, no hints, with a complete review afterwards • An estimated achievement level after every attempt Keep them coming back • Speed Drill, Survival, Race Mode, and a two-player duel on one device • A new challenge question every day • Streaks, daily goals and 21 achievements See exactly where they stand • Mastery across all 25 topics at a glance • A predicted achievement level, and the specific topics holding it back • Weekly progress reports and an exam-readiness checklist • A parent view, plus a progress summary you can share or email For parents Everything is built around one question: what should they work on next? The app answers it on every screen, names the topics that need attention, and links straight to the lesson that teaches them. You do not need to remember Grade 9 math to help. Free and Premium Algebra is free, with 15 practice questions a day and one mini mock test. Premium unlocks all five strands, every guided lesson, unlimited daily practice, full mock exams and the exam simulation, and parent reports. Works on iPhone and iPad. Premium starts with a 7-day free trial. Cancel any time. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple Account. Manage or cancel in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://eager.app/terms Privacy Policy: https://eager.app/privacy

About

Peras

Features
Read full description

Turn your Goal into a personalized learning path with AI explanations, connected concepts, and visible progress. Start where you are Tell Peras what you want to understand and answer a few questions about your starting point. Your Goal becomes a concept map that shows what to learn next and how ideas connect. Learn one idea at a time Read AI-authored explanations in the Reader. Ask for help when something is unclear and mark familiar ideas as known. Keep your learning connected Save useful explanations, take notes, and pick up where you left off. Explore science, technology, the humanities, languages, business, and more through a Goal that matters to you. Start free Create one Goal map and read an introductory preview of the first Section you choose. Peras Premium is a monthly subscription that lets you continue beyond the preview and keep creating Goal maps and learning content. If you’re eligible, try Premium free for 3 days, then pay the monthly price shown before purchase. Your Apple Account is charged when the trial ends. The subscription renews automatically unless canceled at least 24 hours before the trial or current billing period ends. Manage or cancel it in App Store subscription settings. AI-authored material may be incomplete or inaccurate. Verify important information with authoritative sources. Privacy Policy: https://peras.app/privacy Terms of Use: https://peras.app/terms

Screenshots

Grade 9 Math Mastery4 screens
Peras3 screens

Verdict

The call

Grade 9 Math Mastery and Peras are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Grade 9 Math Mastery sells 2 in-app purchases, starting at $4.99 per month and Peras sells 1 in-app purchase, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Grade 9 Math Mastery versus Peras: the parameters behind the verdict, then further details
ParameterGrade 9 Math MasteryPeras
PriceFreeFree
Update frequencyEvery 5 months—
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size7 MB17 MB
Age rating4+12+
DeveloperEager.appEmergent System LLC

In-app purchases

2 purchases

Grade 9 Math Mastery

Subscriptions2
  • Grade 9 Math Mastery — Monthly$4.991 Month
  • Grade 9 Math Mastery — Annual$29.991 Year
1 purchases

Peras

Subscriptions1
  • Peras Premium3 Days trial$7.991 Month

Questions

Is Grade 9 Math Mastery free?
Grade 9 Math Mastery is free to download, with in-app purchases available.
Is Peras free?
Peras is free to download, with in-app purchases available.
Do Grade 9 Math Mastery or Peras have ads?
Neither Grade 9 Math Mastery nor Peras shows ads.

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