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