# Grade 9 Math Mastery — Ontario Test Prep & Lessons > Ontario Test Prep & Lessons (iPhone/iPad app by Eager.app.) - Source: https://appshunter.io/ios/app/grade-9-math-mastery/id6760619466 (this page in markdown: same URL + `.md`) - Developer: [Eager.app](https://appshunter.io/developer/1550371160) - Category: Education, Reference - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 7 MB - Released: 2026-03-20 - Data updated: 2026-08-18 - User reviews in markdown: https://appshunter.io/ios/app/grade-9-math-mastery/id6760619466/reviews.md ## What is Grade 9 Math Mastery? 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 ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Grade 9 Math Mastery — Monthly | $4.99 | per month | | Grade 9 Math Mastery — Annual | $29.99 | per year | ## Version history (last 2 releases) ### 1.1.0 — 2026-08-17 The app used to only test you. Now it teaches first. • 25 guided lessons, one for every topic in the course • Each lesson explains the concept, then walks through worked examples one step at a time • Every lesson names the mistakes students actually make on that topic • A short quick check at the end confirms it stuck, and counts toward your mastery • Find them under Practice, or tap "Learn this concept" on any weak topic in your progress Three times the practice • The question bank has grown from 100 questions to 400 • Every topic now has 15 or more questions instead of 4 • Better spread across difficulty levels, so practice keeps pace as you improve Now on iPad • Every screen adapts to the larger display instead of stretching • Works in portrait and landscape Fixes and polish • Removed the Academic/Applied choice — Ontario moved to a single Grade 9 math course in 2021, and the old setting was hiding whole topics from some students • Fixed two questions that marked the correct answer wrong • Lesson quick checks now count toward your streak and totals • Faster session history, daily challenge history and weekly reports • Fixed overlapping text when revealing worked example steps • Better VoiceOver support in the new lesson screens • Various stability fixes across the game modes ### 1.0 — 2026-03-20 No release notes. ## More apps by Eager.app - [LabelScan](https://appshunter.io/ios/app/labelscan/id6751202947) - [pxCut - Screenshot Editor](https://appshunter.io/ios/app/pxcut-screenshot-editor/id6757092999) - [PlanPop](https://appshunter.io/ios/app/planpop/id6757344367) - [TopSpeller: Spelling Games](https://appshunter.io/ios/app/topspeller-spelling-games/id6757990874) - [SnapSort - Find Any Screenshot](https://appshunter.io/ios/app/snapsort-find-any-screenshot/id6758559645) - [Grade 3 Prep](https://appshunter.io/ios/app/grade-3-prep/id6759871441) All apps by Eager.app: https://appshunter.io/developer/1550371160 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*