What's Hiding? vs Math Duel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
What's Hiding?
This educational app helps young learners practice basic addition and subtraction. It uses visual aids like discs presented in frames, with some hidden to test number sense. The app supports numbers up to 20 and offers options for counting or subtilizing.
- Addition and subtraction practice
- Visual disc counting
- Numbers 1-5, 1-10, or 1-20 support
- 5-frame and 10-frame formats
- Counting or subtilizing options
- iPad specific features
Read full descriptionHide full description
Practice basic addition and subtraction concepts. Discs are counted, then covered, and some slide out from under the cover. Your job is to tell how many are still hidden under the cover. Work with numbers 1-5 or 1-10. Discs are displayed in a 5-frame or 10-frame format. The iPad version includes an option to use numbers to 20 in two 10 frames. This option was added at the request of elementary education teacher candidates at Augustana College in Rock Island, IL who were working with kindergarten students. The iPad version also includes an option to count or subtilize the number of discs. That option was added in response to a user request. Developed as part of the NumberSense Project at Augustana College in Rock Island, IL.
Math Duel
Engage in a fun, competitive math game for two players on a single device. Improve basic math skills and strategic thinking with customizable equations and modes. Ideal for classrooms or home practice, it encourages collaboration and personalized learning.
- Two-player split-screen mode
- Single player practice
- Customizable equations
- Teacher-adjustable settings
- Basic math skill improvement
- Strategic thinking development
Read full descriptionHide full description
Math Duel - 2 Player Math Game Challenge a friend or go solo! Math Duel is the ultimate split-screen math game for kids, students, and classrooms. Two players compete head-to-head on the same device, making math practice fast, fun, and competitive. Perfect for Schools and Home Learning. Used by teachers worldwide, Math Duel turns math drills into exciting duels. Customize difficulty for each player independently, ideal for differentiated instruction and personalized learning. Why Kids and Teachers Love Math Duel: - 1 or 2 players on one device, no extra hardware needed - Split-screen mode built for tablets and phones - Customizable equations for addition, subtraction, multiplication and division - Adjustable difficulty per player, great for mixed-ability classrooms - Positive reinforcement keeps students motivated - Frustration-free design for all skill levels - Trusted with over 1 million games played Built for the Classroom, Fun Enough for Home. Whether it's math fact fluency practice, a classroom warm-up, or friendly competition at home, Math Duel makes arithmetic engaging for all ages. Students sharpen mental math skills without even realizing they're learning. Great for: - Elementary and middle school students - Teachers looking for EdTech tools - Parents seeking educational games for kids - Homeschool families Have a feature idea? Share it directly with Erik, the developer, from inside the app!
Screenshots
Verdict
The clearest difference is rating: Math Duel at 4.5 against What's Hiding?'s 2.0. Math Duel also leads on review sentiment (64% vs 33%) and update cadence (every 6 weeks vs every 10 months). What's Hiding?'s advantage is in-app purchases (none vs 1) and iOS requirement (8.1 vs 15.0). On price, ads, 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
Both are free to download. Math Duel sells 1 one-off in-app purchase. What's Hiding? asks for nothing beyond the download.
Math Duel holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: Math Duel has 237 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of What's Hiding?'s written reviews are positive against 64% of Math Duel's.
What's Hiding? ships an update every 10 months, Math Duel every 6 weeks. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.
| Parameter | What's Hiding? | Math Duel |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (3 ratings) | 4.5 (237 ratings) — better |
| Positive reviews | 33.3% of reviews | 64.4% of reviews — better |
| Number of ratings | 3 | 237 — better |
| Update frequency | Every 10 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.1 — better | 15.0 |
| Further details — not scored | ||
| Size | 37 MB | 86 MB |
| Age rating | 4+ | 4+ |
| Developer | Classroom Focused Software | Ellie's Games, LLC |
Customer experience
What's Hiding?
Math Duel
Bugs and requests
What's Hiding?
Not enough reviews yet to summarise bugs or requests.
Math Duel
Reported bugs
8 issues- App keeps crashing
- Multiplication doesn't work well
- Division problems cannot be solved due to lack of decimal key
- Settings button resets score
- App freezes timer in single player when settings is pressed
Show 3 moreShow fewer
- Division rounds down, teaching incorrect math
- Paid app contains ads
- App keeps cutting off
Requested features
14 requests- Ability to focus on specific timestables
- Option to change operations and differentiation
- Support for older iPads
- Return to increments of 1 for numbers
- Add decimal point for division
Show 9 moreShow fewer
- Option to give both opponents the same problems
- Button to go back to menu
- Button to restart in menu
- Option for number of questions to win
- Pause or stop button
- Online mode
- Ability to disable sound
- Round to the tenths place
- Spinner for difficulty control
In-app purchases
What's Hiding?
No in-app purchases
Math Duel
- Unlock All Features$4.99
Questions
Is What's Hiding? free?
Is Math Duel free?
Which has better reviews, What's Hiding? or Math Duel?
Do What's Hiding? or Math Duel have ads?
Which is updated more often, What's Hiding? or Math Duel?
Other comparisons















