Comparison

Main Idea vs Learn Grammar 3rd Grade

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

Head to head
About

Main Idea

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
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! 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.

About

Learn Grammar 3rd Grade

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
Read full description

Attention parents and educators! Are you looking for a fun, engaging way to boost your child's grammar skills? Look no further than Learn Grammar 3rd Grade, the revolutionary app that's transforming how kids master language. Imagine your child confidently tackling complex sentences, effortlessly identifying parts of speech, and writing with clarity beyond their years. With Learn Grammar 3rd Grade, this dream becomes reality. Our app offers: • 50+ interactive, self-paced lessons covering all 3rd grade Common Core and state grammar standards • World-class read-assist articles paired with adaptive practice questions • Personalized learning experience that evolves with your child's progress • Gamification features to keep kids motivated and excited about learning • Text-to-speech functionality for added accessibility But don't just take our word for it. Here's what parents are saying: "My daughter's writing has improved dramatically since using this app. Her teacher even asked what we were doing at home!" - Sarah M., Mom of 8-year-old "Finally, an educational app that my son actually wants to use!" - Mike T., Dad of 9-year-old Ready to revolutionize your child's grammar skills? Download Learn Grammar 3rd Grade today and start your 7-day free trial. For just $14.99/month after the trial, you'll unlock full access to all 15+ Class Ace apps, 2,500+ lessons, and 20+ innovative AI tools. Don't let your child fall behind. Give them the grammar advantage they deserve. Download Learn Grammar 3rd Grade now and watch their confidence soar! ======= Subscription Info: • Unlimited access to all apps, tools, and lessons by Class Ace starts at $14.99 per month after a 1 week free trail and includes 5 student profiles. • Cancel Anytime: You won't be charged if you cancel before the end of the trial period. • Renewal: Auto-renewal may be turned off anytime from your Apple Subscription Manager. Subscriptions automatically renew unless they are turned off at least 24 hours before the end of the current period in account settings. Renewals are charged within 24-hours preceding the end of the current period. Payment is charged to your iTunes Account at confirmation of purchase. Subscriptions are managed by the user. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to Learn Grammar by Class Ace, where applicable. You can access Learn Grammar without a subscription, but will be limited to 5 free lessons. ======= Help & Support Problems, questions, or want to get in touch? Contact us at support@classace.io Links: Terms of Service: https://classace.io/terms Privacy: https://classace.io/privacy

Screenshots

Main Idea4 screens
Learn Grammar 3rd Grade4 screens

Verdict

The call

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.

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

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Main Idea versus Learn Grammar 3rd Grade: the parameters behind the verdict, then further details
ParameterMain IdeaLearn Grammar 3rd Grade
PriceFreeFree
Rating3.8 (19 ratings)4.6 (36 ratings) — better
Positive reviews71.4% of reviews — better0.0% of reviews
Number of ratings1936 — better
Update frequencyEvery 3 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.211.0 — better
Further details — not scored
Size22 MB88 MB
Age rating4+4+
DeveloperJanine TooleClass Ace LLC

Customer experience

Main Idea

All ratings19 ratings
Positive63.2%
Neutral15.8%
Negative21.1%
Written reviews14 reviews
Positive71.4%
Neutral14.3%
Negative14.3%

Learn Grammar 3rd Grade

All ratings36 ratings
Positive91.7%
Neutral2.8%
Negative5.6%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

3 purchases

Main Idea

One-time3
  • Upgrade to 2 Users$1.99
  • Access All Levels$2.99
  • Up to 10 Users$2.99
12 purchases

Learn Grammar 3rd Grade

Subscriptions12
  • Grammar 3rd Grade 3 Students7 Days trial$6.991 Month
  • Grammar 3rd Grade 5 Students7 Days trial$10.991 Month
  • Grammar 3 Monthly Parent7 Days trial$14.991 Month
Show 9 more
  • Grammar 3rd Yearly - 1 Student7 Days trial$19.991 Year
  • Grammar 3rd Yearly 2 Students7 Days trial$29.991 Year
  • Grammar 3rd Yearly 3 Students7 Days trial$39.991 Year
  • Grammar 3rd Yearly 4 Students7 Days trial$49.991 Year
  • Grammar 3rd Yearly 5 Students7 Days trial$59.991 Year
  • Grammar 3rd Yearly 7 Students7 Days trial$79.991 Year
  • Grammar 3rd Yearly 8 Students7 Days trial$89.991 Year
  • Grammar 3rd Yearly 9 Students7 Days trial$99.991 Year
  • Grammar 3rd Yearly 10 Students7 Days trial$109.991 Year

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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