Comparison

Big or Small 2 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

Big or Small 2

This app helps young children, particularly those with language delays, learn fundamental concepts like size, quantity, and numbers through interactive play. It's designed to support early language development and comprehension using visuals and audio prompts.

Highlights
  • Teaches big, small, quantity, numbers, and position
  • Uses visuals and audio prompts for comprehension
  • Reinforcement based on ABA principles
  • Friendly interface for toddlers and preschoolers
  • Supports native language instructions
  • Includes letters A-Z and numbers 1-20
Features
Read full description

Is your child understanding key developmental concepts like “big” and “small”? Big or Small 2 is a compact, structured learning tool designed for young children—especially those with language delays—to explore foundational ideas like size, quantity, and numbers through playful interaction. At around 30 months, many children begin to grasp basic language and spatial concepts. This app helps you determine if your child is on track—and helps them move forward confidently. Key Features • Learn concepts like big, small, quantity, numbers, and position • Encourages comprehension through visuals and audio prompts • Reinforcement built on the principles of Applied Behavior Analysis (ABA) • Friendly interface for toddlers and preschoolers • Use your native language to communicate instructions • Includes uppercase and lowercase letters A–Z, and numbers 1–20 Built for Parents & Professionals Big or Small 2 is designed for families, speech therapists, and educators to support early language screening and enrichment. Even if English isn’t your first language, the app’s structure allows flexible use with translation by a parent or educator. Multilingual-Friendly Translate instructions in real-time and focus on core concepts. The app is also a great introduction to English letters and numbers for bilingual children. Developmental Note By 30 months, children typically begin to understand contrasts in size, quantity, and space. However, every child develops at their own pace. If you have concerns about your child’s language development, consult a healthcare or educational professional. We’d love your feedback. Have suggestions or questions? Reach out to us via the support link in the app.

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

Big or Small 24 screens
Main Idea4 screens

Verdict

The call

The clearest difference is review sentiment: Main Idea at 85% against Big or Small 2's 0%. Main Idea also leads on rating (4.3 vs 2.3) and update cadence (every 3 months vs every 8 months). Big or Small 2's advantage is price ($4.99 vs $6.99). On ratings volume, ads, in-app purchases and monetization model 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

Big or Small 2 costs $4.99 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 2.3. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews point the same way: 0% of Big or Small 2's written reviews are positive against 85% of Main Idea's.

UpkeepUpdate frequency

Big or Small 2 ships an update every 8 months, Main Idea every 3 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Big or Small 2 versus Main Idea: the parameters behind the verdict, then further details
ParameterBig or Small 2Main Idea
Price$4.99 — better$6.99
Rating2.3 (3 ratings)4.3 (6 ratings) — better
Positive reviews0.0% of reviews84.6% of reviews — better
Number of ratings36 — better
Update frequencyEvery 8 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.112.2 — better
Further details — not scored
Size25 MB22 MB
Age rating4+4+
DeveloperAME Mobile Inc.Janine Toole

Customer experience

Big or Small 2

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Main Idea

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

In-app purchases

None

Big or Small 2

No in-app purchases

None

Main Idea

No in-app purchases

Questions

Is Big or Small 2 free?
Big or Small 2 costs $4.99, with no in-app purchases.
Is Main Idea free?
Main Idea costs $6.99, with no in-app purchases.
Which has better reviews, Big or Small 2 or Main Idea?
Main Idea is rated higher. Big or Small 2 averages 2.3 out of 5 from 3 ratings, while Main Idea averages 4.3 from 6 ratings.
Do Big or Small 2 or Main Idea have ads?
Neither Big or Small 2 nor Main Idea shows ads.
Which is updated more often, Big or Small 2 or Main Idea?
Big or Small 2 ships an update every 8 months, and Main Idea every 3 months. Most recently, Big or Small 2 was updated on October 23, 2026 and Main Idea on October 24, 2026.

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