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 361–380 of 1,000 ranked alternatives.

  1. Unravel: Steel Calculator app icon

    Unravel: Steel Calculator

    Majestic Steel USA, Inc.

    Verify steel coil and sheet specs.

    The app helps flat-rolled steel buyers verify steel coil and sheet specifications. It calculates coil weight, converts gauges to decimals, and finds sheets in a bundle, supporting imperial and metric units.

    ★ 4.910 ratingsUtilitiesFreeData updated 2026-09-23
  2. JicoCalc - Calculator app icon

    JicoCalc - Calculator

    Shanghai Mashang Yunxing Technology Co., Ltd.

    Convert units, calculate formulas, solve equations

    Offers basic and scientific functions for daily tasks and complex computations. It includes unit converters with 41 categories, allowing users to drag and sort units, switch base units, and perform accurate calculations.

    ★ 4.935 ratingsProductivityFreeData updated 2026-09-06
  1. Calendar Reminder app icon

    Calendar Reminder

    文睿 李

    Manage events and daily tasks easily.

    The app manages recurrent events and daily tasks. It provides reminders for birthdays, anniversaries, appointments, and meetings with sound or vibration options.

    ★ 3.02 ratingsUtilitiesFreeData updated 2026-09-18
  2. The Board Feet Calculator app icon

    The Board Feet Calculator

    Dundridge LLC

    Calculate wood measurements and cut lists

    Perform calculations for wood projects. Input measurements and materials. Estimate costs and quantities. Save and share project notes. Convert units and access formulas.

    ★ 4.430 ratingsUtilitiesFreeData updated 2026-09-06
  3. 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.

    ★ 4.612 ratingsProductivityFreeData updated 2026-10-10
  4. ConvertCalc app icon

    ConvertCalc

    Michael Riehl

    Convert units and calculate values

    Allows users to perform calculations and unit conversions within a single . It supports over 200 units across various categories. Users can input equations, view results, and convert units instantly.

    ★ 5.02 ratingsUtilitiesFreeData updated 2026-09-06
  5. Varigate app icon

    Varigate

    Canadian Casing Accessories Inc.

    Calculate casing sizes and pressures

    Calculate casing sizes, weights, and hydrostatic pressure with unit conversions between imperial and metric systems. Switch units instantly. Perform pressure calculations for oil and gas applications. Access accurate data for field and office use.

    ★ 0.00 ratingsUtilitiesFreeData updated 2026-09-06
  6. Simple Units Converter app icon

    Simple Units Converter

    Mind Trends LLC

    Convert units across many dimensions.

    The app provides a general-use calculator for converting between 586 units across 47 dimensions. It is designed for users needing to convert one set of units to another.

    ★ 0.00 ratingsUtilities$0.99Data updated 2026-10-09
  7. PIGEON RACING SPEED CALCULATOR app icon

    PIGEON RACING SPEED CALCULATOR

    Baynon Properties, LLC

    Calculate pigeon speed in real time.

    The app calculates racing pigeon speed in various units including YPM, MPH, and KPH. It allows users to input distance in miles or kilometers and liberation and arrival times to determine speed and overfly allowance.

    ★ 4.73 ratingsUtilities$9.99Data updated 2026-09-17
  8. 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
  9. 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
  10. FlexoPrint2 app icon

    FlexoPrint2

    Print Systems sp z o o spolka komandytowa

    ★ 0.00 ratingsUtilitiesFreeData updated 2026-09-06
  11. Vulcan Materials app icon

    Vulcan Materials

    Vulcan Materials Company

    Calculate material needs for projects

    Estimate construction material quantities for building and paving projects. Input job parameters like length, width, and thickness. Select material properties such as density from predefined options.

    ★ 4.213 ratingsUtilitiesFreeData updated 2026-09-08
  12. MusicMath app icon

    MusicMath

    Laurent Colson

    Musical calculations for audio professionals.

    The app provides tools for musical calculations including timecode, tempo, and frequency conversions. It offers a timecode calculator with frame format management and a tap tempo feature with a metronome.

    ★ 4.212 ratingsMusic$9.99Data updated 2026-09-15

How we rank alternatives

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