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.
e: Spacetime Converter screenshots
Ranked alternatives
Showing 561–580 of 1,000 ranked alternatives.



PixelCalc
John Lullie
Digital image conversion and resizing tool.
The app converts pixels to inches and inches to pixels for digital images. It includes a proportional calculator for resizing images and reference charts for print sizes and shutter speeds.

Air Products Gas Converter
Air Products and Chemicals Inc
Convert industrial gas weight and volume.
The app converts weight and volume measures for industrial gases and liquefied natural gas. It accounts for molecular weight and density when converting between liquid and gaseous units.




Golden Ratio Calculator Plus
Heng Jia Liang
Calculate sides and totals
Calculate the using inputs for the longest side, shorter side, or combined length. Perform instant calculations with support for up to 16 decimal places and various units. Copy results to another and view the formula as a reference.



Calculator - Currency - Unit
hua-shan cheng
Calculate, convert, and track values
Scientific with and conversion capabilities. Perform complex calculations, convert currencies, and switch units. Review and reuse calculation history. Use landscape mode for efficient input and history viewing.







Telescope Eyepiece Calculator
Cederic Schmid
Calculate specs offline
Calculate magnification, exit pupil, true field of view, and f-ratio based on aperture, focal length, and type. Color badges indicate optimal viewing conditions. Results update in real time as inputs change.


How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.