Moon. vs Math Duel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Moon.
Explore detailed information about the moon with a 3D model, lunar phases, and rise/set times. Research moon data for any past or future date and receive notifications for full and new moons.
- 3D Moon model
- Lunar Phase tracking
- Moonrise/Moonset times
- Lunar Illumination
- Research moon data for any date
- Full and new moon notifications
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Moon is a perfect resource to help you learn about the moon. Moon constantly updates a panel of information that tells you everything you want to know about the moon. *3D Moon model *Lunar Phase *Moonrise/Moonset *Lunar Illumination *Lunar Azimuth (where it is in the sky) *Lunar Altitude (angle above the horizon) *Distance to the moon (in miles, kilometers, feet, meters, Eiffel Towers, and Earths) *Phase Timeline (iPad Only) Moon also allows you to research information about the moon at ANY date in past or in the future. You could look up what the lunar phase will be on, say, your birthday...in 10 years. With Moon you can also schedule notifications for full or new moons so you will always be ready to handle the mysterious things that happen during full moons. Features: *Constantly updated moon information for your current location *Ability to research moon information for ANY date EVER based on your current location or any location you choose *Full and new moon notifications *Add Full/New moon dates to your calendar *Custom Location settings *No internet connection required ***Check out Moon+ for added features such as a phase timeline on iPhone, drag to change date, and an adfree experience*** Please email cdvconcepts@gmail.com with any comments, suggestions, or questions.
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
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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 Moon.'s 2.6. Math Duel also leads on review sentiment (64% vs 34%). Moon.'s advantage is in-app purchases (none vs 1) and iOS requirement (7.0 vs 15.0). On price, ratings volume, update cadence and ads 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. Moon. asks for nothing beyond the download.
Math Duel holds the better App Store score, 4.5 against 2.6. Both are backed by a comparable volume of ratings — 288 and 236 respectively. Written reviews point the same way: 34% of Moon.'s written reviews are positive against 64% of Math Duel's.
Moon. ships an update every 2 months, Math Duel every 6 weeks. The most recent releases landed on November 10, 2026 and November 8, 2026 respectively.
| Parameter | Moon. | Math Duel |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (288 ratings) | 4.5 (236 ratings) — better |
| Positive reviews | 33.9% of reviews | 64.4% of reviews — better |
| Number of ratings | 288 — better | 236 |
| Update frequency | Every 2 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 | 7.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 12 MB | 86 MB |
| Age rating | 4+ | 4+ |
| Developer | CDV Concepts | Ellie's Games, LLC |
Customer experience
Moon.
Math Duel
Bugs and requests
Moon.
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
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- 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
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- 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
Moon.
No in-app purchases
Math Duel
- Unlock All Features$4.99









