e: Spacetime Converter app icon

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

e: Spacetime Converter screenshots

Ranked alternatives

Showing 441–460 of 1,000 ranked alternatives.

  1. Basic Electronic Calculator app icon

    Basic Electronic Calculator

    Gergely Nagy

    Calculate voltage, current, resistance, and power

    Calculate voltage, current, resistance, or electric power by entering any two values. Convert results between normal and scientific notation. Display calculated values clearly.

    ★ 3.52 ratingsUtilitiesFreeData updated 2026-09-08
  2. Age Calculator; Date of Birth app icon

    Age Calculator; Date of Birth

    Ankit Seth

    Calculate age in years, months, days, hours,

    Enter a of to calculate age in years, months, days, hours, minutes, and seconds. View real-time updates of seconds alive. Receive fun facts about milestones like the 10,000th day alive. Sync with calendar for event reminders.

    ★ 4.84 ratingsUtilitiesFreeData updated 2026-09-06
  3. UConverter++ app icon

    UConverter++

    Rushikesh Samaiahgare

    Convert units with precision and ease

    Convert units of length, temperature, mass, and more. Switch between metric and imperial systems. Input values and receive instant, accurate results. Save frequently used conversions for quick access.

    ★ 5.01 ratingsUtilitiesFreeData updated 2026-09-06

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.