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 461–480 of 1,000 ranked alternatives.

  1. Share Large Video on WhatsApp app icon

    Share Large Video on WhatsApp

    Ofir Yagil

    Send full-length videos instantly

    Compresses videos to fit within social limits. Sends full-length videos without trimming. Supports and other social apps. Maintains quality during compression. Allows direct sharing from the .

    ★ 3.919 ratingsProductivityFreeData updated 2026-09-06
  1. Evaluate app icon

    Evaluate

    Aaron Rennow

    Calculate expressions like a calculator.

    The app allows users to type mathematical expressions similar to those on a graphing calculator. It computes complicated formulas, making complex calculations accessible.

    ★ 3.811 ratingsProductivityFreeData updated 2026-09-17
  2. Unit Convert All-in-One app icon

    Unit Convert All-in-One

    Rakesh Vaghasiya

    Units across categories

    Units across categories like Length, Weight, Temperature, and Data Storage. Choose from subcategories such as meters to kilometers or Celsius to Fahrenheit. Enter values and receive precise conversions.

    ★ 0.00 ratingsUtilitiesFreeData updated 2026-09-06
  3. Ontime Logs app icon

    Ontime Logs

    OnTime Logs Inc.

    Monitor vehicle location and speed

    Track vehicle location, speed, and miles traveled in real time. Monitor route selection and detention time. Log driver activities and compliance data. Generate reports for FMCSA regulations. Set alerts for speed or location deviations.

    ★ 4.012 ratingsUtilitiesFreeData updated 2026-09-06
  4. Mushometer app icon

    Mushometer

    Eric Schweichler

    Track dog miles and performance.

    The app tracks a dog's miles and performance. It exports runs in GPS format for use in other applications and integrates with HealthKit to record runs as workouts.

    ★ 4.06 ratingsSportsFreeData updated 2026-09-14
  5. Explore NYC app icon

    Explore NYC

    Rothrock Group, LLC

    Sights on foot with guided narration

    Lower Manhattan with guided walking tours featuring narration, GPS-enabled maps, and real-time directions. View 16 sights over 3.5 miles. Pause and resume tours during rain. Access offline maps and audio guides. Share locations and track progress.

    ★ 4.419 ratingsTravel$1.99Data updated 2026-09-08
  6. GO-21 SciRPN app icon

    GO-21 SciRPN

    Steve Lidie

    Calculate using RPN and stack registers

    Simulates a retro scientific calculator with RPN input. Features a 10-digit LED display, four stack registers, and a storage register. Includes math, trigonometric, and logarithmic functions. Displays results in polar/rectangular formats.

    ★ 4.913 ratingsUtilities$2.99Data updated 2026-09-08
  7. Quick Converter Pro app icon

    Quick Converter Pro

    Exeersoft Inc

    Convert units and currencies instantly

    Convert units across 180+ categories including angles, areas, cooking units, weight, clothing, and shoes. Convert 180+ currencies and digital currencies like Bitcoin and Doge. Enter values and get instant conversion results.

    ★ 4.018 ratingsUtilitiesFreeData updated 2026-09-06
  8. VR Science Lab app icon

    VR Science Lab

    Abacus Brands Inc.

    Explore with AR and VR experiments

    Explore through 25 interactive experiments in AR and VR. Learn about chemical reactions, sound waves, and acidity. Perform hands-on activities like erupting a volcano, lighting an LED with lemons, and making slime.

    ★ 4.113 ratingsEducationFreeData updated 2026-09-24
  9. SPEEDLINE ELD app icon

    SPEEDLINE ELD

    Speedline ELD LLC

    Log hours, track trips, stay compliant

    Track driving hours and compliance with real-time logs. Monitor miles driven and engine hours. Manage hours of service (HOS) and reduce paperwork. Sync with devices for accurate data entry. Generate reports and export logs for audits.

    ★ 5.01 ratingsBusinessFreeData updated 2026-09-06
  10. Heatloss Calculator & Guide app icon

    Heatloss Calculator & Guide

    Mr Combi Sales Ltd.

    Calculate heatloss and radiator output.

    The app calculates room heatloss in Watts and BTUs per hour based on dimensions and temperatures. It also estimates radiator length or power output and converts between Watts and BTU/h.

    ★ 1.52 ratingsProductivity$4.99Data updated 2026-10-11

How we rank alternatives

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