무한 사칙연산 (infinity calc)

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About this app

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

What’s new

쪽지시험이 더 똑똑해졌어요!
- 시험 기록에서 결과를 누르면 어떤 문제를 맞고 틀렸는지 문제별로 확인할 수 있어요.
- 정답/오답/미응답 필터로 원하는 문제만 골라볼 수 있어요.
- 새로 시작할 때 기본 출제가 '한자리수 곱셈'으로 맞춰져 더 쉽게 시작해요.
- 자잘한 안정성 개선.