Unlimited Calculator Pro

Unlimited Calculator is the most powerful calculator available on the App Store. Unlike standard calculators limited to 15–16 digits, Unlimited Calculator handles numbers of any size — millions of digits — with perfect precision.

Whether you are a student, engineer, researcher, or simply curious about mathematics, Unlimited Calculator gives you tools that go far beyond arithmetic.

What makes it unique:

Arbitrary-precision arithmetic using BigInteger — no rounding, no overflow, no limits RSA key generation (256 to 2048 bit) with step-by-step explanation Diffie-Hellman key exchange demonstration Collatz conjecture explorer with animated sequences Prime factorization, Euler totient, Miller-Rabin primality test Special sequences: Fibonacci, Catalan, Bell numbers, and factorial with exact BigInteger results Matrix calculator for linear algebra operations Unit and currency converter Function grapher with zoom and pan Finance calculator (compound interest, loan amortization) Scan handwritten or printed expressions using the camera (OCR) Multi-base display: see your result simultaneously in decimal, hexadecimal, binary, and octal Calculation history with tags, star, and CSV/JSON export Home screen widget showing your last calculation Full VoiceOver accessibility support Dark mode, light mode, and custom accent color Complete Italian localization