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 601–620 of 1,000 ranked alternatives.



Kalc
YUTA OKAJIMA
Convert units, calculate, track time
Convert units between different systems with a simple interface. Perform basic and advanced calculations. View and switch between time zones with an intuitive world clock.


Price Match: Unit Converter
PongYin Siu
Convert units quickly and accurately
Convert units across 6 categories including volume, weight, temperature, area, and more. Switch between metric and imperial systems. Input values manually or scan text for automatic conversion. Share results via copy or email.

Angle Finder - Trig Calculator
Shital Gorasiya
Calculate angles, solve triangles, and compute trigonometric
Calculate angles, side lengths, and hypotenuse of triangles. Determine arc radius, arc length, chord length, and chord height. Solve trigonometric problems with precise formulas and tools. Input measurements to get accurate geometric results.









Hearsay Lite
Chun-Yi Kuo
Browse lyrics, sync with music, track timestamps
Display lyrics synchronized with music playback. Support LRC format with timestamps and offsets. Allow browsing of dynamically typed lyrics. Enable user interaction with emojis and multiple timestamps.





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