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 821–840 of 1,000 ranked alternatives.

  1. DMXDIPster - DIP Switch Helper app icon

    DMXDIPster - DIP Switch Helper

    Misquoted Tech LLC

    Convert DMX to DIP switches instantly

    The app provides instant conversion between DMX addresses and DIP switch settings. It allows users to view switch positions in both graphic and text formats.

    ★ 1.01 ratingsUtilities$0.99Data updated 2026-09-09
  1. ThePrimes app icon

    ThePrimes

    Damir Kolobaric

    Create prime number formulas on a grid.

    The app presents a game focused on prime numbers and mathematical operations within a 5x8 grid. Players select numbers and operations alternately to construct prime number expressions, with game speed increasing as the score rises.

    ★ 0.00 ratingsGamesFreeData updated 2026-09-17
  2. ExampleConv app icon

    ExampleConv

    Delight System, Inc.

    Converts units for various measurements.

    The app performs unit conversions for weight, area, volume, length, and speed. It supports units such as meters, yards, and 尺貫, along with less common units for varied conversions.

    ★ 0.00 ratingsBusinessFreeData updated 2026-10-05
  3. SideHustleHub app icon

    SideHustleHub

    Maxim Fedorets

    Track gigs, log income, and estimate taxes

    Log income, expenses, miles, and hours for side gigs and freelance work. Set daily reminders and track progress with premium reports. Estimate taxes and manage multiple income streams in one .

    ★ 0.00 ratingsProductivityFreeData updated 2026-09-06
  4. Chain & Sprocket Calculator app icon

    Chain & Sprocket Calculator

    Vladislav Zhirnov

    Calculate and ratios

    Calculate gear ratios and speeds by entering teeth. Determine length and tension. Select sizes and types. Export calculations as PDF or image. Compare setups for efficiency.

    ★ 0.00 ratingsUtilities$0.99Data updated 2026-09-06
  5. Geonial Orte app icon

    Geonial Orte

    Oliver Kuehne

    Locate German cities on a map.

    The app challenges users to locate over 400 German cities on a map. Users can play against real or virtual opponents, with separate statistics tracked for each player.

    ★ 1.01 ratingsGamesFreeData updated 2026-10-10

How we rank alternatives

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