# Main Idea vs 7th Grade Math

The clearest difference is price: Main Idea at $6.99 against 7th Grade Math's $12.99. Main Idea also leads on update cadence (every 3 months vs every 8 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Main Idea costs $6.99 and 7th Grade Math $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Main Idea ships an update every 3 months, 7th Grade Math every 8 months. The most recent releases landed on October 6, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Main Idea | 7th Grade Math |
| --- | --- | --- |
| Price | **$6.99** | $12.99 |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/main-ideasentences/id895686005/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 84.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | Paid | — |
| Size | 22 MB | 446 MB |
| Requires iOS | 12.2 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [Math Galaxy](https://appshunter.io/developer/500490521) |

## What reviewers say

### Main Idea

[App page](https://appshunter.io/ios/app/main-ideasentences/id895686005)

This app helps children in grades 2-5 improve their reading comprehension by teaching them to identify the main idea of sentences. It uses a fun, game-like environment with step-by-step learning and a reward system to keep kids motivated.

**Highlights:** Step-by-step skill building, Incremental learning with unlocked levels, Frustration-free guided learning, Engaging reward center, Parental review and reporting, Over 600 examples, Timed levels for fluency

**Features:** macOS Compatibility

**In-app purchases:** none


### 7th Grade Math

[App page](https://appshunter.io/ios/app/7th-grade-math-math-galaxy/id966986367)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Main Idea free?

Main Idea costs $6.99, with no in-app purchases.

### Is 7th Grade Math free?

7th Grade Math costs $12.99, with no in-app purchases.

### Do Main Idea or 7th Grade Math have ads?

Neither Main Idea nor 7th Grade Math shows ads.

### Which is updated more often, Main Idea or 7th Grade Math?

Main Idea ships an update every 3 months, and 7th Grade Math every 8 months. Most recently, Main Idea was updated on October 6, 2026 and 7th Grade Math on September 29, 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.*