CalcIUM: Scientific Calculator

CalcIUM is a calculator with an intuitive, modern interface for everyday calculations. Scientific functions, graphs, unit conversion, time calculations, programmer tools, arbitrary-precision arithmetic, and other advanced features are organized into dedicated mini-panels, keeping routine calculations uncluttered and the interface clean.

From quick daily calculations to advanced technical work, CalcIUM combines precise arithmetic, flexible graphing, and practical tools in one app.

EVERYDAY CALCULATOR
• Clear, familiar calculator layout
• Fast basic and percentage calculations
• Scientific functions available when needed
• Smart input and syntax highlighting
• Calculation history with comments
• No ads and no sign-in required

SCIENTIFIC & PRECISION
• 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

GRAPHING
• 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 conversion history

INTERFACE & THEMES
• Ten visual themes: Beach Pebbles, Starry Night, Porcelain Wine, Industrial Ember, Nordic Blue, Violet Carbon, Retro Instrument, Moonstone Slate, Cathedral Obsidian, and Sanctum Sky
• Beach Pebbles and Starry Night are included for free; eight additional themes are available with PRO
• Each theme has its own fonts, button shapes, colors, shadows, status-bar styling, and optional display texture
• Visual Theme Picker with theme previews
• Direct access to the Extension Panel from the main menu
• Ten interface languages: English, Russian, Ukrainian, German, Spanish, French, Hungarian, Portuguese (Brazil), Hindi, and Japanese
• Customizable display format

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

ADDITIONAL TOOLS
• Extension Panel with quick access to additional calculator 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
• Built-in What's New information for app updates

PRIVACY & DATA
• 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 range of scientific, graphing, conversion, and utility tools
• PRO unlocks additional advanced tools, graphing capabilities, unit-conversion categories, access to recently used tools, and eight premium themes
• PRO is available through a one-time in-app purchase with no subscription
• Premium themes can be previewed before purchase
• The current license status and available features 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.