Comparison

Question Sleuth 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

Question Sleuth

A language game for two or more players where one person hides a star behind a picture and others guess its location by asking questions. Customize categories and play for all ages, making it ideal for families and educators.

Highlights
  • Picture-based guessing game
  • Secret star hiding mechanic
  • Process of elimination gameplay
  • Customizable image categories
  • Use camera or web images
  • Suitable for all ages
Features
Read full description

Calling All Sleuths! Are you clever enough to ask the right questions and find the hidden star? Give it a try with this delightfully entertaining language game designed for two or more players. Pick a player to secretly hide the star behind a picture and let everyone else compete to find it through the process of elimination. Use our image categories or go ahead and make your own using the iPad's camera, your photos or search from the web. Question Sleuth is a great way to practice categories, attributes, "wh" questions, articulation or whatever you like. Game play can be customized for all ages and makes a great family activity! Though designed with educators in mind, Question Sleuth is a fun, imaginative and engaging game to play with family and friends as well.

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

Main Idea4 screens

Verdict

The call

The clearest difference is rating: Question Sleuth at 5.0 against Main Idea's 4.3. Question Sleuth also leads on price ($1.99 vs $6.99) and iOS requirement (10.0 vs 12.2). Main Idea's advantage is update cadence (every 3 months vs every 29 months) and review sentiment (85% vs 67%). On 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

Question Sleuth costs $1.99 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

Question Sleuth holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews complicate that: 67% of Question Sleuth'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

Question Sleuth ships an update every 29 months, Main Idea every 3 months. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

Scorecard7 real differences · 3 level
Question Sleuth versus Main Idea: the parameters behind the verdict, then further details
ParameterQuestion SleuthMain Idea
Price$1.99 — better$6.99
Rating5.0 (2 ratings) — better4.3 (6 ratings)
Positive reviews66.7% of reviews84.6% of reviews — better
Number of ratings26 — better
Update frequencyEvery 29 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS10.0 — better12.2
Further details — not scored
Size118 MB22 MB
Age rating4+4+
DeveloperZorten Software, LLCJanine Toole

Customer experience

Question Sleuth

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral16.7%
Negative16.7%

Main Idea

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

In-app purchases

None

Question Sleuth

No in-app purchases

None

Main Idea

No in-app purchases

Questions

Is Question Sleuth free?
Question Sleuth costs $1.99, with no in-app purchases.
Is Main Idea free?
Main Idea costs $6.99, with no in-app purchases.
Which has better reviews, Question Sleuth or Main Idea?
Question Sleuth is rated higher. Question Sleuth averages 5.0 out of 5 from 2 ratings, while Main Idea averages 4.3 from 6 ratings.
Do Question Sleuth or Main Idea have ads?
Neither Question Sleuth nor Main Idea shows ads.
Which is updated more often, Question Sleuth or Main Idea?
Question Sleuth ships an update every 29 months, and Main Idea every 3 months. Most recently, Question Sleuth was updated on October 2, 2026 and Main Idea on October 6, 2026.

Other comparisons