CrazyMinute vs Main Idea
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CrazyMinute
A fun math quiz designed by educators to help children master basic arithmetic facts. It features a unique interface for easy answer entry and positive reinforcement, with no penalties for incorrect attempts.
- Basic math fact practice
- Addition, subtraction, multiplication, division
- Customizable problem variations
- Unique digitBar™ interface
- Positive reinforcement, no penalties
- No text, symbol-based interaction
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Created by a parent and a primary-school teacher, CrazyMinute is a fun math quiz on basic facts with a myriad of problem variations and a unique interface. iPad users also have an additional game variation to choose from: see the companion app MathNight, exclusively for iPad. This 60-second quiz incorporates playful sound effects along with the unique digitBar™ interface for easily entering answers. With one finger or thumb dedicated to the ones place and one for the tens place, students can quickly enter and correct answers while reinforcing an important understanding of how numbers are built. Created for everyone, there is no text used anywhere in the game: all interaction is stripped-down to the essential meanings of numbers, math symbols, and a few colored buttons, making it perfect for early readers and parents worldwide. Each game reviews skills in addition, subtraction, multiplication or division; players can choose quizzes from a range of random values (from 0 through an upper-bound) or against a fixed value (to focus on just “your 8s” for example). Designed for positive reinforcement, problems simply remain on the screen until answered correctly, so there is no penalty other than lost time for typos or incorrect attempts. Whatever skill level you work on, practicing basic math facts helps all math students create a solid foundation for working easily with all types of mathematics, and will help students progress quickly through the “Mad Minute” quizzes given daily in many schools’ early grades. How many can you answer, before time runs out?
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.
- 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
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** 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
Verdict
The clearest difference is rating: CrazyMinute at 5.0 against Main Idea's 4.3. CrazyMinute also leads on price ($0.99 vs $6.99) and chart position (#195 vs unranked). Main Idea's advantage is update cadence (every 3 months vs every 16 months) and ratings volume (6 vs 1). On ads, in-app purchases, monetization model and device support 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
CrazyMinute costs $0.99 and Main Idea $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CrazyMinute holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Main Idea has 6 ratings behind it against 1, so its average is the more settled of the two.
CrazyMinute ships an update every 16 months, Main Idea every 3 months. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.
| Parameter | CrazyMinute | Main Idea |
|---|---|---|
| Price | $0.99 — better | $6.99 |
| Rating | 5.0 (1 ratings) — better | 4.3 (6 ratings) |
| Positive reviews | — | 84.6% of reviews |
| Number of ratings | 1 | 6 — better |
| Update frequency | Every 16 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #195 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 12.2 |
| Further details — not scored | ||
| Size | 3 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Dan Dickerman | Janine Toole |
Customer experience
CrazyMinute
Main Idea
In-app purchases
CrazyMinute
No in-app purchases
Main Idea
No in-app purchases









