# Main Idea vs Learn Grammar 3rd Grade

The clearest difference is review sentiment: Main Idea at 71% against Learn Grammar 3rd Grade's 0%. Main Idea also leads on monetization model (free with in-app purchases vs subscription). Learn Grammar 3rd Grade's advantage is rating (4.6 vs 3.8) and update cadence (every 10 days vs every 3 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Main Idea sells 3 one-off in-app purchases and Learn Grammar 3rd Grade sells 12 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Learn Grammar 3rd Grade holds the better App Store score, 4.6 against 3.8. Both are backed by a comparable volume of ratings — 19 and 36 respectively. Written reviews complicate that: 71% of Main Idea's written reviews are positive against 0% of Learn Grammar 3rd Grade's, so the app with the better star average is not the one people write more warmly about.

Main Idea ships an update every 3 months, Learn Grammar 3rd Grade every 10 days. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Main Idea | Learn Grammar 3rd Grade |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (19 ratings)](https://appshunter.io/ios/app/main-idea-sentences/id895683482/reviews) | **[4.6 (36 ratings)](https://appshunter.io/ios/app/learn-grammar-3rd-grade/id1570163685/reviews)** |
| Number of ratings | 19 | **36** |
| Positive reviews | **71.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 22 MB | 88 MB |
| Requires iOS | 12.2 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [Class Ace LLC](https://appshunter.io/developer/1303170818) |

## What reviewers say

### Main Idea

[App page](https://appshunter.io/ios/app/main-idea-sentences/id895683482)

This app helps children in grades 2-5 develop reading comprehension skills by focusing on identifying the main idea of sentences. It uses a fun, game-like approach with step-by-step learning and rewards to keep kids motivated. Designed by educators, it's suitable for both typical and special needs children.

**Highlights:** Step-by-step skill building, Game-like environment, Frustration-free learning, Reward Center for motivation, Parental review and reporting, Over 600 examples, Designed by teachers and researchers

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to 2 Users | $1.99 | one-time |
| Access All Levels | $2.99 | one-time |
| Up to 10 Users | $2.99 | one-time |


### Learn Grammar 3rd Grade

[App page](https://appshunter.io/ios/app/learn-grammar-3rd-grade/id1570163685)

This app offers interactive lessons and practice exercises designed to improve a child's grammar skills. It covers Common Core standards with adaptive questions and gamification to keep young learners engaged. A free trial is available, followed by a monthly subscription for full access.

**Highlights:** 50+ interactive lessons, Adaptive practice questions, Personalized learning, Gamification features, Text-to-speech functionality, Covers Common Core standards

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grammar 3rd Grade 3 Students | $6.99 | per month |
| Grammar 3rd Grade 5 Students | $10.99 | per month |
| Grammar 3 Monthly Parent | $14.99 | per month |
| Grammar 3rd Yearly - 1 Student | $19.99 | per year |
| Grammar 3rd Yearly 2 Students | $29.99 | per year |
| Grammar 3rd Yearly 3 Students | $39.99 | per year |
| Grammar 3rd Yearly 4 Students | $49.99 | per year |
| Grammar 3rd Yearly 5 Students | $59.99 | per year |
| Grammar 3rd Yearly 7 Students | $79.99 | per year |
| Grammar 3rd Yearly 8 Students | $89.99 | per year |
| Grammar 3rd Yearly 9 Students | $99.99 | per year |
| Grammar 3rd Yearly 10 Students | $109.99 | per year |


## Frequently asked questions

### Is Main Idea free?

Main Idea is free to download, with in-app purchases available.

### Is Learn Grammar 3rd Grade free?

Learn Grammar 3rd Grade is free to download, with in-app purchases available.

### Which has better reviews, Main Idea or Learn Grammar 3rd Grade?

Learn Grammar 3rd Grade is rated higher. Main Idea averages 3.8 out of 5 from 19 ratings, while Learn Grammar 3rd Grade averages 4.6 from 36 ratings.

### Do Main Idea or Learn Grammar 3rd Grade have ads?

Neither Main Idea nor Learn Grammar 3rd Grade shows ads.

### Which is updated more often, Main Idea or Learn Grammar 3rd Grade?

Main Idea ships an update every 3 months, and Learn Grammar 3rd Grade every 10 days. Most recently, Main Idea was updated on October 17, 2026 and Learn Grammar 3rd Grade on October 2, 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.*