# AB Math Expert vs Main Idea

The clearest difference is price: AB Math Expert at $0.99 against Main Idea's $6.99. AB Math Expert also leads on iOS requirement (8.0 vs 12.2). Main Idea's advantage is rating (4.3 vs 4.1). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

AB Math Expert costs $0.99 and Main Idea $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Main Idea holds the better App Store score, 4.3 against 4.1. Both are backed by a comparable volume of ratings — 13 and 6 respectively. Written reviews complicate that: 91% of AB Math Expert's written reviews are positive against 85% of Main Idea's, so the app with the better star average is not the one people write more warmly about.

AB Math Expert ships an update every 2 months, Main Idea every 3 months. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | AB Math Expert | Main Idea |
| --- | --- | --- |
| Price | **$0.99** | $6.99 |
| Rating | [4.1 (13 ratings)](https://appshunter.io/ios/app/ab-math-expert/id423244428/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/main-ideasentences/id895686005/reviews)** |
| Number of ratings | **13** | 6 |
| Positive reviews | **90.9% of reviews** | 84.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | Paid |
| Size | 17 MB | 22 MB |
| Requires iOS | **8.0** | 12.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nicolas Lehovetzki](https://appshunter.io/developer/412827944) | [Janine Toole](https://appshunter.io/developer/839832427) |

## What reviewers say

### AB Math Expert

[App page](https://appshunter.io/ios/app/ab-math-expert/id423244428)

Engage in a fast-paced mental calculation game that tests your speed and concentration. Click on bubbles in ascending order to solve math problems under time pressure. Compete globally and challenge yourself with five difficulty levels.

**Highlights:** Mental calculation game, Bubble clicking in ascending order, Speed and concentration challenge, Global ranking via Game Center, 5 difficulty levels, Universal app for iPad and iPhone

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is AB Math Expert free?

AB Math Expert costs $0.99, with no in-app purchases.

### Is Main Idea free?

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

### Which has better reviews, AB Math Expert or Main Idea?

Main Idea is rated higher. AB Math Expert averages 4.1 out of 5 from 13 ratings, while Main Idea averages 4.3 from 6 ratings.

### Do AB Math Expert or Main Idea have ads?

Neither AB Math Expert nor Main Idea shows ads.

### Which is updated more often, AB Math Expert or Main Idea?

AB Math Expert ships an update every 2 months, and Main Idea every 3 months. Most recently, AB Math Expert was updated on October 18, 2026 and Main Idea on October 16, 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.*