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 401–420 of 1,000 ranked alternatives.

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    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
  2. 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
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    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
  2. Wire Gauge Calculator app icon

    Wire Gauge Calculator

    Paul Pollock

    Calculate wire resistance and gauge.

    The app calculates wire resistance based on gauge and length. It also determines the minimum wire gauge for a given material, length, and maximum voltage drop.

    ★ 1.01 ratingsUtilitiesFreeData updated 2026-10-25
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    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
  4. CalcApp - Simple Calculator app icon

    CalcApp - Simple Calculator

    尉 张

    Calculate, convert, and solve equations

    Perform basic arithmetic, scientific calculations, and programmer-specific conversions. Save results to a history log. Switch between different calculation modes and unit conversions.

    ★ 4.728 ratingsUtilitiesFreeData updated 2026-09-12
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    myAge

    Alexander Rutkowskij

    See age, zodiac, and elements for birthdays

    Calculate age in years, months, weeks, and days based on a set birthday. View Zodiac signs, Chinese Zodiac, and elemental affiliations.

    ★ 4.525 ratingsLifestyle$0.99Data updated 2026-10-18
  6. Developer Calc Hex Dec Oct Bin app icon

    Developer Calc Hex Dec Oct Bin

    DAI WEIJIE

    Calculate in multiple number systems

    Perform calculations with binary, octal, decimal, and hexadecimal values displayed simultaneously. Enter and view hex codes and RGB values on the same screen. Display up to 19 decimal digits. Toggle conversion reset on or off.

    ★ 4.114 ratingsUtilitiesFreeData updated 2026-09-08
  7. John Cominio RPN Calculator app icon

    John Cominio RPN Calculator

    John Cominio

    Calculate using RPN notation and scientific functions

    Scientific with reverse polish notation. Perform square root, reciprocal, trigonometric functions, hyperbolic functions, and logarithms. Switch between degrees, radians, and gradians. Calculate factorials, exponents, and nth roots.

    ★ 4.99 ratingsProductivityFreeData updated 2026-09-08

How we rank alternatives

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