Digital Elements vs Grade 9 Math Mastery
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Digital Elements
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Euclid’s Elements stands as the most widely read mathematical treatise of all times. Delements is an innovative, digital and interactive edition of this monumental book, in modern Greek. By combining geometry, history of mathematics, as well as digital technology, Delements aims to provide high school students with a unique opportunity: (a) to reconstruct Euclid’s demonstrations through interactive diagrams; (b) to delve into historical insights about ancient mathematics; and (c) to cultivate software development skills. Delements includes: (a) The ancient Greek text of Euclid’s Elements from the edition by J. L. Heiberg. (b) Interactive diagrams for many propositions of Euclid's Elements. (c) Selected recordings of the ancient text as well as other audio-visual material. (d) Ideas for the pedagogical utilization of thematic units from the secondary education’s curriculum. This application is part of the project ‘Digital Elements’, which is supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the 3rd Call for ‘Science and Society’: Nodes of Research, Innovation, and knowledge diffusion. (F.N.: 2183). It is hosted by the Laboratory for the Electronic Processing of Historical Archives within the Department of History and Philosophy of Science at the National and Kapodistrian University of Athens. It is based on REPOX and GeoGebra.
Grade 9 Math Mastery
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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
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Verdict
The clearest difference is in-app purchases: Digital Elements at none against Grade 9 Math Mastery's 2. Digital Elements also leads on update cadence (every 4 weeks vs every 5 months) and iOS requirement (15.5 vs 17.0). On price, ads and device support 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
Both are free to download. Grade 9 Math Mastery sells 2 in-app purchases, starting at $4.99 per month. Digital Elements asks for nothing beyond the download.
Digital Elements ships an update every 4 weeks, Grade 9 Math Mastery every 5 months. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.
| Parameter | Digital Elements | Grade 9 Math Mastery |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.5 — better | 17.0 |
| Further details — not scored | ||
| Size | 8 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Datawise Data Engineering LLC | Eager.app |
In-app purchases
Digital Elements
No in-app purchases
Grade 9 Math Mastery
- Grade 9 Math Mastery — Monthly$4.991 Month
- Grade 9 Math Mastery — Annual$29.991 Year
Questions
Is Digital Elements free?
Is Grade 9 Math Mastery free?
Do Digital Elements or Grade 9 Math Mastery have ads?
Which is updated more often, Digital Elements or Grade 9 Math Mastery?
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