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 281–300 of 1,000 ranked alternatives.



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.


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.


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.

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.



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.

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.


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.


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.


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.

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.

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