# Add and subtract within 20 > Interactive math game for children mastering addition and subtraction up to 20. (iPhone/iPad app by Sergey Malugin.) - Source: https://appshunter.io/ios/app/add-and-subtract-within-20/id757149544 (this page in markdown: same URL + `.md`) - Developer: [Sergey Malugin](https://appshunter.io/developer/562782409) - Category: Education - Price: $2.99 - Age rating: 4+ - Requires: iOS 12.0 · 18 MB - Languages: American English, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek, Hebrew, Indonesian and 15 more - Released: 2013-12-10 - Data updated: 2026-08-24 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/add-and-subtract-within-20/id757149544/reviews.md ## What is Add and subtract within 20? 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. ## Key features - Interactive mini-games - Handwriting recognition - Adaptive difficulty - Targeted addition/subtraction practice - Natural learning input ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/add-and-subtract-within-20/id757149544/reviews.md ### 4/5 — Great *2014-02-05* Exactly the type of adding app I have been looking for! I have taught my students to use tally marks to add and this app allows them to draw those marks. We do have to erase those tally marks from the screen before writing the final answer, which is why it is 4 stars. ## Frequently asked questions about Add and subtract within 20 ### What age is Add and Subtract within 20 suitable for? Add and Subtract within 20 is suitable for children aged 4 and above. The app's content and gameplay are designed to be engaging and educational for this age group. ### How does Add and Subtract within 20 help children learn math? The app uses interactive mini-games and handwriting recognition to make learning addition and subtraction within 20 fun and effective. It offers targeted practice and adapts difficulty to keep children motivated. ### Can children write their answers in Add and Subtract within 20? Yes, the app features advanced handwriting recognition technology, allowing children to write their answers naturally. This enhances both their math skills and handwriting. ### What devices is Add and Subtract within 20 available on? Add and Subtract within 20 is available on iPhone, iPad, and iPod. It is designed to work across these Apple devices. ### How often is Add and Subtract within 20 updated? The app was last updated on March 8, 2025, indicating regular updates to improve performance and features. The latest version is 5.0.0. ### What is the price of Add and Subtract within 20? Add and Subtract within 20 is a paid app with a price of $2.99. There are no in-app purchases or subscriptions required after the initial purchase. ### Does Add and Subtract within 20 have ads? No, Add and Subtract within 20 does not contain advertisements. The app is ad-free, providing an uninterrupted learning experience for children. ### What specific math skills does Add and Subtract within 20 focus on? Add and Subtract within 20 specifically focuses on improving addition and subtraction skills with numbers up to 20. It aims to build a strong mathematical foundation in these areas. ## Version history (last 5 releases) ### 5.0.0 — 2025-03-08 Updated to iOS SDK 18.2 and AIR SDK 51.1 ### 4.0.2 — 2020-06-29 Bugfixes. ### 4.0.1 — 2020-01-12 Bugfixes. ### 3.1.0 — 2017-01-16 Math Shot minigame ### 1.0.1 — 2013-12-18 Fixed localization issues. ## Apps similar to Add and subtract within 20 | App | Rating | Price | Category | | --- | --- | --- | --- | | [Math for Kids - Play & Learn](https://appshunter.io/ios/app/math-for-kids-play-and-learn/id1422472877) | 4.4 (308) | Free | Education | | [Math School: Grade 1-4](https://appshunter.io/ios/app/math-school-grade-1-4/id6744967056) | — | Free | Education | | [Math Learning for Children](https://appshunter.io/ios/app/math-learning-for-children/id6737409371) | — | Free | Education | | [Rechentrainer](https://appshunter.io/ios/app/rechentrainer/id1497635657) | — | Free | Education | | [Monsty: First Math](https://appshunter.io/ios/app/monsty-first-math/id6738328693) | — | $2.99 | Education | | [Math For Kids - Learn Math](https://appshunter.io/ios/app/math-for-kids-learn-math/id6737850355) | — | Free | Education | ## More apps by Sergey Malugin - [Addieren bis 10](https://appshunter.io/ios/app/addieren-bis-10/id562782346) - [Adding up to 10](https://appshunter.io/ios/app/adding-up-to-10/id573010678) - [Math up to 10 in German](https://appshunter.io/ios/app/math-up-to-10-in-german/id576823054) - [Subtract and add up to 10](https://appshunter.io/ios/app/subtract-and-add-up-to-10/id577848734) - [Вычитание и сложение до 10](https://appshunter.io/ios/app/10/id577942601) - [Сложение до 10](https://appshunter.io/ios/app/10/id578054035) All apps by Sergey Malugin: https://appshunter.io/developer/562782409 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*