Comparison

TeslaTown 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

TeslaTown

Explore electricity generation and delivery through interactive structures and informational photos. This app is designed for upper elementary and middle school students to learn about electromagnetism and energy systems.

Highlights
  • Electricity generation and delivery exploration
  • Hydroelectric, solar, and wind power examples
  • Interactive structures
  • Informational photographs
  • Electromagnetism topics
  • Grades 3-8 curriculum alignment
Read full description

Enter Tesla Town and explore electricity generation and delivery. Go into a hydroelectric power plant and see the turbine. Visit a solar powered house or a wind farm. - Designed for upper elementary and middle school students, grades 3-8 - Introduces topics related to electromagnetism - Demonstrates the importance and workings of current and future electricity generation and delivery systems. - Features include interactive structures and informational photographs Developed by power engineering experts and educators from the Office for Mathematics, Science, and Technology Education (MSTE) and from the Information Trust Institute (ITI) at the University of Illinois at Urbana-Champaign. ©2018 The Board of Trustees of the University of Illinois. All rights reserved. The Cyber Resilient Energy Delivery Consortium (CREDC) performs multidisciplinary R&D that addresses the cybersecurity of power grids and oil & gas refinery and pipeline operations. CREDC is funded by the U.S. Department of Energy (https://energy.gov), and the U.S. Department of Homeland Security (https://www.dhs.gov). Consortium partners include: University of Illinois at Urbana-Champaign, Argonne National Laboratory, Arizona State University, Dartmouth College, the Massachusetts Institute of Technology, Old Dominion University, Oregon State University, the Pacific Northwest National Laboratory, Rutgers University, Tennessee State University, the University of Houston, and Washington State University.

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.

Screenshots

TeslaTown4 screens
Main Idea4 screens

Verdict

The call

The clearest difference is in-app purchases: TeslaTown at none against Main Idea's 3. TeslaTown also leads on iOS requirement (9.3 vs 12.2). Main Idea's advantage is update cadence (every 3 months vs every 74 months) and rating (3.8 vs 3.5). On price, ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Main Idea sells 3 one-off in-app purchases. TeslaTown asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Main Idea holds the better App Store score, 3.8 against 3.5. Both are backed by a comparable volume of ratings — 15 and 19 respectively. Written reviews point the same way: 56% of TeslaTown's written reviews are positive against 71% of Main Idea's.

UpkeepUpdate frequency

TeslaTown ships an update every 74 months, Main Idea every 3 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
TeslaTown versus Main Idea: the parameters behind the verdict, then further details
ParameterTeslaTownMain Idea
PriceFreeFree
Rating3.5 (15 ratings)3.8 (19 ratings) — better
Positive reviews55.6% of reviews71.4% of reviews — better
Number of ratings1519 — better
Update frequencyEvery 74 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.3 — better12.2
Further details — not scored
Size75 MB22 MB
Age rating4+4+
DeveloperUniversity of IllinoisJanine Toole

Customer experience

TeslaTown

All ratings15 ratings
Positive53.3%
Neutral13.3%
Negative33.3%
Written reviews9 reviews
Positive55.6%
Neutral11.1%
Negative33.3%

Main Idea

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

In-app purchases

None

TeslaTown

No 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

Questions

Is TeslaTown free?
TeslaTown is free to download, with no in-app purchases.
Is Main Idea free?
Main Idea is free to download, with in-app purchases available.
Which has better reviews, TeslaTown or Main Idea?
Main Idea is rated higher. TeslaTown averages 3.5 out of 5 from 15 ratings, while Main Idea averages 3.8 from 19 ratings.
Do TeslaTown or Main Idea have ads?
Neither TeslaTown nor Main Idea shows ads.
Which is updated more often, TeslaTown or Main Idea?
TeslaTown ships an update every 74 months, and Main Idea every 3 months. Most recently, TeslaTown was updated on October 26, 2026 and Main Idea on October 24, 2026.

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