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 381–400 of 1,000 ranked alternatives.

  1. Easy Units: currency converter app icon

    Easy Units: currency converter

    T-GROUP LLC

    Convert units, track measurements, and share results

    Measure and convert units for length, weight, temperature, speed, and . Use the built-in ruler tool to measure distances. Convert between units within categories. View conversion history and save frequently used conversions.

    ★ 4.36 ratingsUtilitiesFreeData updated 2026-09-06
  2. SConvert app icon

    SConvert

    振动 周

    Convert currencies, track prices, and calculate units

    Convert units across 158 currencies, bitcoin, and precious metals. Convert measurements in currency, weight, time, length, and more. Copy and paste values directly. Assist software designers with UI size conversions. No advertisements.

    ★ 4.821 ratingsUtilities$0.99Data updated 2026-09-06
  1. Km To Mile Calculator For Go app icon

    Km To Mile Calculator For Go

    FreCre, Inc. Japan

    Convert km to miles and open Pokemon

    Convert kilometers to miles with a simple . Open Pokémon Go directly from the . Track distance traveled and view converted measurements in real-time.

    ★ 4.828 ratingsUtilitiesFreeData updated 2026-09-11
  2. GSTrackme 3 app icon

    GSTrackme 3

    GS Trackme LLC

    Track vehicles in real time with map

    Track vehicles in real time with real-time location updates. Select a single vehicle for focused monitoring. View speed in miles per hour with color-coded indicators for movement and speed limit violations. Switch between map and satellite views.

    ★ 4.69 ratingsNavigationFreeData updated 2026-09-06
  3. QuickMPG - gas mileage calculator app icon

    QuickMPG - gas mileage calculator

    Steven Romej

    Calculate gas mileage on one screen.

    The app calculates fuel mileage by entering trip meter miles and gallons used. It displays the current MPG rating and the date and rating of the last fill-up for easy comparison.

    ★ 2.010 ratingsUtilitiesFreeData updated 2026-09-12
  4. BrewRatio app icon

    BrewRatio

    Andrew Bangs

    Brew coffee with precise ratios

    Calculate coffee brewing ratios with adjustable variables. Convert units between grams, milliliters, and ounces. Set and track brewing time with a built-in timer.

    ★ 4.736 ratingsFood & DrinkFreeData updated 2026-09-12
  5. Physics at school app icon

    Physics at school

    Vladimir Vascak

    Learn with interactive animations

    Learn and mathematics through interactive animations. Explore gravitational fields, vibrations, waves, and electric currents. Study atomic and nuclear with visual simulations. View detailed explanations and diagrams for each topic.

    ★ 3.01 ratingsEducation$14.99Data updated 2026-09-09
  6. HP-35 app icon

    HP-35

    Enrique Haro

    ★ 5.05 ratingsUtilitiesFreeData updated 2026-09-06
  7. Mila's Tools: Unit Converter app icon

    Mila's Tools: Unit Converter

    Scott DeSapio

    Convert units with precision and speed

    Convert units across categories like area, length, and temperature. Switch between metric and imperial systems. Calculate fuel efficiency and convert data between bits and bytes. Sync with Apple devices for seamless use.

    ★ 0.00 ratingsUtilities$19.99Data updated 2026-09-08
  8. EVO ELD app icon

    EVO ELD

    Evo ELD Inc.

    Track vehicle location and speed

    Track vehicle location, speed, and miles traveled. Monitor route selection and detention time. Record driver activities and compliance data. Generate reports for FMCSA regulations. Manage fleet operations and improve safety.

    ★ 4.513 ratingsBusinessFreeData updated 2026-09-06
  9. Lunar Birthday's - Shengri app icon

    Lunar Birthday's - Shengri

    Jacob Zachary Cooper

    Track birthdays and zodiac signs

    Track birthdays by converting Gregorian dates to equivalents. Calculate exact birth dates, Chinese zodiac signs, and upcoming celebration dates. View traditional calendar details for Chinese, Taiwanese, Korean, and Vietnamese families.

    ★ 5.06 ratingsLifestyleFreeData updated 2026-09-06
  10. Paces - Easy Pace Conversions app icon

    Paces - Easy Pace Conversions

    CodexBit Software Srl-D

    Convert , speed, and time for runners

    Convert running and cycling between minutes per kilometer, minutes per mile, and miles per hour. Calculate marathon times based on given or determine needed for a target marathon time. Estimate ride duration for a given distance and average speed.

    ★ 4.615 ratingsUtilities$1.99Data updated 2026-09-14
  11. Scientific Calculator * app icon

    Scientific Calculator *

    TOWER OF HANOI SOFTWARE COMPANY LIMITED

    Calculate, convert, exchange, solve

    Solve math problems with basic and complex calculations. Convert units and exchange currencies. Use fractions and square root functions. Perform calculations quickly and accurately.

    ★ 4.710 ratingsProductivityFreeData updated 2026-09-06

How we rank alternatives

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