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 601–620 of 1,000 ranked alternatives.

  1. Kalc app icon

    Kalc

    YUTA OKAJIMA

    Convert units, calculate, track time

    Convert units between different systems with a simple interface. Perform basic and advanced calculations. View and switch between time zones with an intuitive world clock.

    ★ 4.73 ratingsUtilitiesFreeData updated 2026-09-08
  1. Price Match: Unit Converter app icon

    Price Match: Unit Converter

    PongYin Siu

    Convert units quickly and accurately

    Convert units across 6 categories including volume, weight, temperature, area, and more. Switch between metric and imperial systems. Input values manually or scan text for automatic conversion. Share results via copy or email.

    ★ 0.00 ratingsReferenceFreeData updated 2026-09-06
  2. Angle Finder - Trig Calculator app icon

    Angle Finder - Trig Calculator

    Shital Gorasiya

    Calculate angles, solve triangles, and compute trigonometric

    Calculate angles, side lengths, and hypotenuse of triangles. Determine arc radius, arc length, chord length, and chord height. Solve trigonometric problems with precise formulas and tools. Input measurements to get accurate geometric results.

    ★ 1.01 ratingsUtilitiesFreeData updated 2026-09-06
  3. Hearsay Lite app icon

    Hearsay Lite

    Chun-Yi Kuo

    Browse lyrics, sync with music, track timestamps

    Display lyrics synchronized with music playback. Support LRC format with timestamps and offsets. Allow browsing of dynamically typed lyrics. Enable user interaction with emojis and multiple timestamps.

    ★ 0.00 ratingsMusicFreeData updated 2026-09-06

How we rank alternatives

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