Comparison

Add and subtract within 20 vs Monsty

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

Head to head
About

Add and subtract within 20

This app transforms math practice into an exciting adventure for children. It uses interactive mini-games and handwriting recognition to make learning addition and subtraction within 20 fun and effective. The difficulty adapts to your child's progress for a personalized experience.

Highlights
  • Interactive mini-games
  • Handwriting recognition
  • Adaptive difficulty
  • Targeted addition/subtraction practice
  • Natural learning input
Features
Read full description

Transform Math Practice into an Exciting Adventure! Are you looking for an engaging way to help your child master addition and subtraction within 20? Our app combines education with entertainment, offering a unique experience that makes learning math both fun and effective. Key Features: Interactive Mini-Games: Children can enjoy a variety of simple yet captivating mini-games that make math practice enjoyable. Handwriting Recognition: Leveraging advanced handwritten digit recognition technology, the app allows children to write their answers naturally, enhancing both their math skills and handwriting. Adaptive Difficulty: The app adjusts the level of difficulty based on your child's progress, ensuring a personalized learning experience that keeps them challenged yet motivated. Why Choose Our App? Natural Learning Experience: By allowing handwriting input, children can focus on solving problems without the distractions of multiple-choice questions or keyboard input, promoting better concentration and learning outcomes. Skill Enhancement: Designed specifically to improve addition and subtraction skills with numbers up to 20, our app provides targeted practice to build a strong mathematical foundation. Engaging Content: The fun mini-games and adaptive challenges keep children engaged, making them more likely to practice regularly and develop a love for math.

About

Monsty

Features
Read full description

Help your child learn numbers, counting, and addition and subtraction up to 10 with "Monsty: First Math"! This fun and educational math app is perfect for preschoolers and 1st graders starting their math journey. Kids practice number recognition, counting, and simple addition and subtraction up to 10 β€” all while playing with Monsty and Friends! Key Features: - Practice first numbers, counting, and number recognition in a playful way. - Learn plus and minus (addition and subtraction) up to 10 without timers or pressure. - Solve math problems with the help of adorable monster characters. - Designed for preschool and 1st grade learners. - Kid-safe, ad-free, and easy to navigate. "Monsty: First Math" helps children build confidence in math by mastering numbers and practicing addition and subtraction up to 10. Whether your child is learning to count, add, or subtract, Monsty makes early math fun, friendly, and stress-free. Download now and make learning math your child’s favorite adventure!

Screenshots

Add and subtract within 204 screens
Monsty4 screens

Verdict

The call

The clearest difference is update cadence: Monsty at every 6 weeks against Add and subtract within 20's every 36 months. Add and subtract within 20's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Add and subtract within 20 costs $2.99 and Monsty $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Add and subtract within 20 ships an update every 36 months, Monsty every 6 weeks. The most recent releases landed on August 24, 2026 and August 21, 2026 respectively.

Scorecard2 real differences Β· 6 level
Add and subtract within 20 versus Monsty: the parameters behind the verdict, then further details
ParameterAdd and subtract within 20Monsty
Price$2.99$2.99
Positive reviews100.0% of reviewsβ€”
Update frequencyEvery 36 monthsEvery 6 weeks β€” better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidβ€”
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 β€” better15.1
Further details β€” not scored
Size18 MB29 MB
Age rating4+4+
DeveloperSergey MaluginPATRICIA SAUER

In-app purchases

None

Add and subtract within 20

No in-app purchases

None

Monsty

No in-app purchases

Questions

Is Add and subtract within 20 free?
Add and subtract within 20 costs $2.99, with no in-app purchases.
Is Monsty free?
Monsty costs $2.99, with no in-app purchases.
Do Add and subtract within 20 or Monsty have ads?
Neither Add and subtract within 20 nor Monsty shows ads.
Which is updated more often, Add and subtract within 20 or Monsty?
Add and subtract within 20 ships an update every 36 months, and Monsty every 6 weeks. Most recently, Add and subtract within 20 was updated on August 24, 2026 and Monsty on August 21, 2026.

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