CalcIUM is a powerful scientific and engineering calculator with graphing, unit conversion, programmer number modes, and advanced math tools. It combines high-precision arithmetic, a full graphing workspace, and practical utility features for students, engineers, and anyone who needs reliable math every day.

CORE MATHEMATICS
• Operator-precedence engine
• Trigonometric and inverse trigonometric functions
• Hyperbolic and inverse hyperbolic functions
• Logarithmic and exponential functions
• Arbitrary-precision decimal arithmetic (BigDecimal)
• Complex nested expressions with parentheses
• Factorial, permutations, and combinations (nPr, nCr)
• Percentage calculations (classic and simple modes)
• Multiple rounding modes

NUMBER SYSTEMS
• Binary, octal, decimal, and hexadecimal
• Bitwise operations (AND, OR, XOR, NOT, shifts)
• Configurable word size (8 / 16 / 32 / 64 bit)
• Signed and unsigned modes

GRAPHING ENGINE
• Function graphs y = f(x)
• Parametric graphs x(t), y(t)
• Polar graphs r(θ)
• Multi-series rendering with individual colors
• First and second derivative visualization
• Asymptote detection
• Area under the curve (integrals)
• 38 visual presets
• Graph history with export and sharing options

UNIT CONVERSION
• 21 categories
• 100+ units
• Recent conversions tracking

ADDITIONAL TOOLS
• Time and duration calculations
• DMS (degrees, minutes, seconds) conversion
• Number analysis (sign, integer and fractional parts, parity)
• Random number generator with seed control
• 20+ physical and mathematical constants
• SI prefixes

INTERFACE
• Light and dark themes
• Syntax highlighting
• Calculation history with comments
• Seven interface languages: English, Russian, Ukrainian, German, Spanish, French, and Hungarian
• Customizable display format

PRIVACY & DATA
• No ads and no sign-in required
• Calculation history and graph history are stored locally on your device
• No third-party analytics; crash reporting (Firebase Crashlytics) may be used to improve stability — see the Privacy Policy for details

FREE AND PRO
• The free version of CalcIUM already includes a wide set of scientific, graphing, and utility tools
• PRO unlocks additional advanced features through a one-time in-app purchase with no subscription
• The current license status and available feature set can be checked on the in-app About screen

Need help? Open the built-in Help from the app menu. For support, use the contact email shown in About.

CalcIUM: Scientific Calculator