12th Grade Math Challenge vs Grammar Jammer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
12th Grade Math Challenge
Test your knowledge with 12th-grade level math problems and puzzles. Track your progress, challenge friends, and earn a certificate of your final score. Step-by-step solutions are available for better understanding.
- 12th-grade math questions
- Math puzzles
- Score certificates
- Challenge friends
- Step-by-step solutions
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Challenge your mind with 12th grade level Math and see where you stand. There are 100 questions/levels sprinkled with some interesting Math puzzles in between. Create and share a certificate of your final score. Challenge your friends and family to see who can score the most. Watch step-by-step solution for better understanding of answers.
Grammar Jammer
Learn English tenses with visual grammar formulas. This app presents active and passive voice tenses with affirmative, negative, and interrogative structures. Includes tests and exercises for mastery.
- Visual grammar formulas
- 16 active voice tenses
- 10 passive voice tenses
- Affirmative, negative, interrogative structures
- Tests and exercises
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This app has been created to help students with forming English tenses correctly using grammar formulas. The app visually presents 16 active voice tenses and 10 passive voice tenses. Each tense show affirmative, negative, and interrogative structures. There are tests and extra exercises to help you master all English tenses.
Screenshots
Verdict
The clearest difference is price: 12th Grade Math Challenge at Free against Grammar Jammer's $3.99. 12th Grade Math Challenge also leads on device support (3 vs 1) and ratings volume (3 vs 1). Grammar Jammer's advantage is update cadence (monthly vs every 11 months). On rating, ads 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
12th Grade Math Challenge is free to download; Grammar Jammer costs $3.99 up front. 12th Grade Math Challenge sells 1 one-off in-app purchase and Grammar Jammer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for 12th Grade Math Challenge against 5.0 for Grammar Jammer. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
12th Grade Math Challenge ships an update every 11 months, Grammar Jammer monthly. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.
| Parameter | 12th Grade Math Challenge | Grammar Jammer |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 11 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.1 |
| Further details — not scored | ||
| Size | 34 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | IT365 Solutions Inc | VITALY KIRILOV |
Customer experience
12th Grade Math Challenge
Grammar Jammer
In-app purchases
12th Grade Math Challenge
- Remove all Ads from Math 12$0.99
Grammar Jammer
- Extras$3.99
- Premium Lifetime Access$3.99
Questions
Is 12th Grade Math Challenge free?
Is Grammar Jammer free?
Which has better reviews, 12th Grade Math Challenge or Grammar Jammer?
Do 12th Grade Math Challenge or Grammar Jammer have ads?
Which is updated more often, 12th Grade Math Challenge or Grammar Jammer?
Other comparisons
