Comparison

AB Math Expert vs Main Idea

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AB Math Expert

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
Read full description

Stimulate your brain with an addictive mental calculation game ! Follow your world ranking with the Game Center The principle of the game is simple : - click on the bubbles in ascending order The bubbles turn around, time is limited and there are many tricks. It is a calculation game, but also a speed and concentration challenge. Available as an universal app for both iPad and iPhone/iPod touch - 5 levels of difficulty - very difficult at the highest levels Will you match the challenge ? From the same author : AB Math - fun game for kids Word Domino

About

Main Idea

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
Read full description

** Featured on Appolicious.com & iHeartThisApp.com ** 'Main Idea -Sentences' helps kids who have trouble with reading comprehension. Identifying the main idea is a key part of reading comprehension. 'Main Idea -Sentences' builds this comprehension skill in a fun, game-like environment. The skill is developed step-by-step until mastery. *** Happy Frog Apps is a Mom's Choice Award winner! *** ***** 5 Stars - Thank you for this app! Other software I’ve used has moved too quickly for my son. This one worked! Can’t wait for the next Main Idea app…it’s coming, right? ***** 5 Stars - This app is one the best education apps I have used with my little one. It really helps to improve his reading abilities. He is obsessed with passing the levels and it never let him disappointed. One of the few apps that worth to upgrade to premium version. 'Main Idea - Sentences' is designed for children in Grades 2-5 who can read the words, but don't understand what they read. Beginning readers in earlier grades can also benefit from the targeted skill development. 'Main Idea - Sentences' develops the skill of knowing what a sentence is about. This skill must be firmly established before a child can determine what a paragraph or page is about. Key Benefits: - Builds comprehension skills step-by-step until mastery. - Incremental learning. New levels are unlocked only when your child is ready. - Frustration-free learning. Your child will always be guided to the correct answer. - Fun and engaging Reward Center to increase motivation. - Easy parental review. Just check out the stars to see how your child is doing. - Contains over 600 examples, with content designed by professional teachers and researchers. - Advanced levels include timers to ensure fluency. Research shows fluency in the foundation skills is critical to reading comprehension. - Can be used independently (just hand it over: your child will know what to do!) or with a therapist/parent for reading intervention. - Provides extensive reporting for up to 10 students to suit the needs of parents, teachers and therapists. Our apps are designed for and tested by typical and special needs children. Testers include children with Autism and other special needs. Our apps work for them! This 'School Edition' app has no in-app purchases. To evaluate the app, download the free version, which has 4 free levels. Additional levels and additional players can be accessed with in-app purchase. If you prefer no in-app purchases, download the School Edition of this app. While you're thinking about reading, check out our other apps that target WH questions, inferencing and answer identification skills. Learn more about reading comprehension and research at our website www.HappyFrogApps.com. Drop us a note, we'd love to hear from you! We take customer service very seriously! If you ever have a problem or find that we've missed something, contact us at our website and we will do our best to fix the problem. We are a member of the Moms With Apps program that promotes privacy in children's apps. We collect NO private information in our apps and our apps do not allow unrestricted web access.

Screenshots

AB Math Expert4 screens
Main Idea4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
AB Math Expert versus Main Idea: the parameters behind the verdict, then further details
ParameterAB Math ExpertMain Idea
Price$0.99 — better$6.99
Rating4.1 (13 ratings)4.3 (6 ratings) — better
Positive reviews90.9% of reviews — better84.6% of reviews
Number of ratings13 — better6
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better12.2
Further details — not scored
Size17 MB22 MB
Age rating4+4+
DeveloperNicolas LehovetzkiJanine Toole

Customer experience

AB Math Expert

All ratings13 ratings
Positive76.9%
Neutral7.7%
Negative15.4%
Written reviews33 reviews
Positive90.9%
Neutral6.1%
Negative3.0%

Main Idea

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews13 reviews
Positive84.6%
Neutral7.7%
Negative7.7%

In-app purchases

None

AB Math Expert

No in-app purchases

None

Main Idea

No in-app purchases

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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