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 281–300 of 1,000 ranked alternatives.

  1. Subnet Mask Wheel app icon

    Subnet Mask Wheel

    Takahiro Furuya

    Display subnet mask and host addresses.

    The app displays subnet mask information including decimal, binary, and prefix length. It also shows the number of available host addresses.

    ★ 5.01 ratingsProductivityFreeData updated 2026-10-03
  1. GeoGebra Geometry app icon

    GeoGebra Geometry

    GeoGebra GmbH

    Construct geometric shapes and share results

    Construct geometric shapes using points, lines, circles, polygons, and angles. Drag points to explore interactive . Measure lengths and areas. Transform shapes through mirroring, rotating, and dilating.

    ★ 4.074 ratingsEducationFreeData updated 2026-09-12
  2. RaceTools app icon

    RaceTools

    MirzaWorks LLC

    Calculate ethanol goals and track fuel efficiency

    Ethanol Calculator allows users to determine the mix of pump gas and ethanol gas needed for a desired blend by entering specific details. Users can review past calculations for quick recalculation.

    ★ 4.978 ratingsUtilitiesFreeData updated 2026-09-06
  3. Fuel Calculator App app icon

    Fuel Calculator App

    SHPAVDA, TOO

    Estimate cost and efficiency

    Calculate consumption and efficiency to estimate travel costs and needs. Input distance and used to determine economy. Choose between imperial or US customary units. Adjust settings for different regions and vehicle types.

    ★ 4.740 ratingsUtilitiesFreeData updated 2026-09-06
  4. Streaks - Exceed Your Goals app icon

    Streaks - Exceed Your Goals

    Theo Schuetz

    Set , track progress, stay consistent

    Set personalized for fitness, diet, and lifestyle changes. Track progress daily with habit logs and reminders. Receive motivational prompts and adjust as needed. Sync data across devices for consistent tracking.

    ★ 4.845 ratingsUtilitiesFreeData updated 2026-09-11
  5. Vintage-45 app icon

    Vintage-45

    Willy Kunz

    Calculate with HP-45 precision

    Simulate the HP-45 scientific calculator with photo-realistic design and animated keys. Perform all original functions and operations. Access a secret stopwatch. Adjust processing speed between real-time and simulated.

    ★ 4.819 ratingsProductivity$0.99Data updated 2026-10-25
  6. Swim Time Calculator app icon

    Swim Time Calculator

    umimplavat.cz s.r.o.

    Calculate pace with stroke rate and length

    Calculate performance improvements by adjusting stroke rate and stroke length. Input current metrics to estimate reductions. Export data for analysis and track progress over sessions.

    ★ 0.00 ratingsSportsFreeData updated 2026-09-06
  7. DMS Converter app icon

    DMS Converter

    Geospike Pty Ltd

    Convert Decimal Degrees to DMS

    The app converts between Decimal Degrees and Degrees/Minutes/Seconds notation. It allows viewing converted coordinates in Maps or sending them to GPS Log.

    ★ 3.628 ratingsNavigationFreeData updated 2026-09-15
  8. Sala App app icon

    Sala App

    SALA TECH DIGITAL SOLUTIONS (CAMBODIA) CO., LTD

    Find majors, access info, get guidance

    Highschool students in Cambodia can explore university and school information, compare programs, and find career fit through assessments. Access educational promotions and compare college offers.

    ★ 4.28 ratingsEducationFreeData updated 2026-09-06
  9. Inch Converter app icon

    Inch Converter

    Paul Robbins

    Convert decimal lengths to fractions.

    The app converts decimal length measurements to imperial mixed fractions of an inch. Users can choose under or over rounding and set the desired ruler increment.

    ★ 3.513 ratingsUtilities$0.99Data updated 2026-10-14

How we rank alternatives

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