Apps Like e: Spacetime Converter for iPhone and iPad
Convert length and time relativistically.
The app converts between length and time using geometrized units where the speed of light is unity. It allows users to think about the world differently by converting units like inches to seconds or miles to years.
by Elliptics, Ltd.★ 5.01 ratingsEducationFreeData updated 2026-09-10
Convert instantly with support for 12+ types including real-time currency rates. Switch between quickly. View accurate conversions and exchange rates. Save frequently used conversions for quick access.
AR measuring lets users tap two points on the camera screen to measure object lengths. Auto convert button changes units. performs basic math functions.
Convert units across categories like length, weight, temperature, and volume. Select units, input values, and receive instant results. Access a comprehensive list of measurement systems. Share results via email or copy to clipboard.
Solves math problems with support for multi-story fractions, powers, and roots. Calculates trigonometric functions and complex numbers. Stores expressions and answers. Switches between basic, , and fraction modes.
Calculate angles for cross braces and table x bracing. Input width, height, and board dimensions. Choose board orientation. Display angles for board ends and intersections. Support imperial and metric units. Provide board length requirements.
The app calculates using dates, times, years, days, hours, minutes, and seconds. It converts between these units and performs addition, subtraction, multiplication, and division.
Objects, lengths, angles, areas, and heights using augmented reality. Switch between metric and imperial units. Take screenshots, use flashlight, and draw clear measurement lines. Perform single or chained measurements and estimate person height.
The app converts between units in categories like length, temperature, and weight. It provides access to previous conversions through a history list with colored categories.
Convert inches to centimeters with precise calculations. Input measurements and receive instant conversions. Save frequently used values for quick access. Share results via copy or email.
Calculates air volume, pressure loss, velocity, and duct size for rectangular or round ducts. Supports both imperial and metric units. Users input values to determine required dimensions and system performance.
The app provides multiple length arithmetic calculations with a Flat UI. Users can swipe to switch between six color themes, copy numbers to the pasteboard, and open the app using a URL scheme.
Currency converter lets users switch between currencies. Unit converter changes measurements like length and temperature. Percentage computes percentages. BMI estimates body mass index. Tip determines tips based on bill amount.
Measure lengths with a ruler supporting metric and imperial units. Detect ambient noise levels using a decibel meter. Use a protractor tool to measure angles via the camera. Calibrate screens for accurate color display.