# 12th Grade Math Challenge vs Grammar Jammer

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.

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.

## The numbers

| Metric | 12th Grade Math Challenge | Grammar Jammer |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/12th-grade-math-challenge/id1626192903/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/grammar-jammer/id6756280046/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 34 MB | 1 MB |
| Requires iOS | **13.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [IT365 Solutions Inc](https://appshunter.io/developer/1531416759) | [VITALY KIRILOV](https://appshunter.io/developer/1857721875) |

## What reviewers say

### 12th Grade Math Challenge

[App page](https://appshunter.io/ios/app/12th-grade-math-challenge/id1626192903)

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.

**Highlights:** 12th-grade math questions, Math puzzles, Score certificates, Challenge friends, Step-by-step solutions

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove all Ads from Math 12 | $0.99 | one-time |


### Grammar Jammer

[App page](https://appshunter.io/ios/app/grammar-jammer/id6756280046)

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.

**Highlights:** Visual grammar formulas, 16 active voice tenses, 10 passive voice tenses, Affirmative, negative, interrogative structures, Tests and exercises

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extras | $3.99 | one-time |
| Premium Lifetime Access | $3.99 | one-time |


## Frequently asked questions

### Is 12th Grade Math Challenge free?

12th Grade Math Challenge is free to download, with in-app purchases available.

### Is Grammar Jammer free?

Grammar Jammer costs $3.99, and also offers in-app purchases.

### Which has better reviews, 12th Grade Math Challenge or Grammar Jammer?

12th Grade Math Challenge and Grammar Jammer are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do 12th Grade Math Challenge or Grammar Jammer have ads?

Neither 12th Grade Math Challenge nor Grammar Jammer shows ads.

### Which is updated more often, 12th Grade Math Challenge or Grammar Jammer?

12th Grade Math Challenge ships an update every 11 months, and Grammar Jammer monthly. Most recently, 12th Grade Math Challenge was updated on October 21, 2026 and Grammar Jammer on October 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*