무한 사칙연산 (infinity calc)

Infinity Calc is a simple and fast Android learning app that allows you to practice addition, subtraction, multiplication, and division infinitely, down to the number of digits.

It is suitable for aptitude test takers, students learning multiplication tables, and anyone who wants to reinforce basic arithmetic.

▌ Key Features

• Free selection of 4 operations (+, −, ×, ÷). Set range from 1 to 4 digits.

• For division, select Integer/Decimal mode and adjust decimal places from 1 to 3.

• Instant feedback on correct/incorrect answers, display of the correct answer value.

• Auto-progress mode — Automatically moves to the next problem shortly after input.

• Visualizes auto-progress waiting time with a countdown bar.

• Cumulative statistics — Number of solutions, accuracy rate, current/best consecutive correct answers, cumulative solution time.

• Light / Dark / System themes.

• Haptic feedback (optional).

▌ No Login, No Network

• This app does not request internet permissions.

• All settings and learning statistics are stored only on the user's device and are not transmitted externally.

▌ Fast Keypad, Fast Response

• Number keys activate the moment a finger touches them. Optimized for continuous, fast input.

• Asynchronous statistics saving to prevent input loss (no interruption to UI flow).

▌ Recommended for:

• Students preparing for aptitude tests or NCS quantitative reasoning exams

• Elementary, middle, and high school students who want to repeatedly practice multiplication tables and basic arithmetic

• Parents who want to give their children a safe, short-term practice app

• Anyone who wants to lighten their thinking

▌ Privacy Policy

All data is stored only on the user's device. For details, please refer to the App Store's Privacy Policy.

▌ Contact Us

Please submit inquiries or suggestions for improvement regarding the app via GitHub Issues.

https://github.com/Sevring/infinitycal/issues