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 741–760 of 1,000 ranked alternatives.

  1. I Can Convert It app icon

    I Can Convert It

    Telphasa Limited

    Units, currencies, and angles

    Units of angle, area, and other categories. Switch between degrees, radians, grads, and more. currencies online or offline. Add new categories based on user requests. Sync results and share conversions.

    ★ 1.01 ratingsUtilities$0.99Data updated 2026-09-08
  2. Gauge Ghost app icon

    Gauge Ghost

    Bronson Holland

    Enter miles remaining to track fuel left

    Track fuel levels by inputting the last displayed "miles remaining." Monitor actual fuel consumption during driving. Determine true empty point based on real trip data. No setup required. No technical jargon.

    ★ 5.02 ratingsNavigationFreeData updated 2026-09-06
  3. Stelar 3.14 app icon

    Stelar 3.14

    Stylianos Karantonas

    Convert units, track time, save results

    Convert measurements for jewelry making with precise calculations. Calculate ring sizes based on diameter or circumference. Save and share conversion results. Access essential tools for accurate bench work and streamline measurement processes.

    ★ 0.00 ratingsProductivityFreeData updated 2026-09-06

How we rank alternatives

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