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 301–320 of 1,000 ranked alternatives.
Camera Measure - PartoMeter
VisTech.Projects LLC
Objects with your phone
Object dimensions using phone and reference objects like credit cards or DVDs. Snap photos for accurate in-plane measurements. Add custom reference objects with known sizes. Export measurement data for later review.
Units Free
Piet Jonas
Convert units across multiple categories.
The app converts between units in categories like length, temperature, and weight. It provides access to previous conversions through a history list with color-coded categories.
Construction Calc Pro 7
Troy Knight
Enter data, get precise results
Calculate weight and volume using width, length, and thickness. Input measurements in feet/inches or metric. Includes aggregate and asphalt calculators with precise results. Features high visibility text for direct sunlight use.
EZPZ Unit Converter
Martin Engelsgjerd
Convert units with saved favorites
Convert units across 17 categories including currency, temperature, length, weight, speed, area, and volume with over 1000 conversions and 160+ live currency rates. Save frequently used conversions and access them via a widget.
Professor Maxwell’s 4D Galaxy
SpiceBox Product Development Ltd.
Explore space with interactive VR projects
Explore interactive 3D models of the solar system and Earth's layers. Build a sundial and walk on the moon. Use augmented reality to visualize space concepts. Access 20 science projects with guided instructions.
CNVRT: SI Unit Conversion Tool
Pascal Andraos
Convert units instantly and accurately
Convert units of measurement with support for weight, length, temperature, speed, area, time, data storage, and angle. Input values and select units for instant . Syncs with Apple Health for seamless tracking.
Measuring Tape Ruler Pro App
Junaid Mukadam
Measure objects with your phone camera
Measure length, height, and area using AR technology. Point camera at objects or people. Add lines or shapes to measure. Save photos with measurements. Sync measurements across devices.
Unit Converter - OmniConvert
Jonathan Chen
Convert units and currencies offline
Convert units and currencies with real-time exchange rates and offline support. Switch between dark mode and light mode. Access calculators for salary, gratuity, and more. Perform unlimited conversions without size limits.
Temperature Converter ∞
Chen-Yu Wei
Convert between Celsius, Fahrenheit, and Kelvin
Convert temperatures between Celsius, Fahrenheit, and Kelvin. Input a value and instantly switch units. Display results in selected format. Share converted values via copy-paste or screenshot.
Span Calc
American Wood Council
Calculate wood joist and rafter spans.
The app calculates spans for wood joists and rafters using softwood and hardwood lumber data. It determines maximum horizontal spans for common loading conditions and allows comparison of multiple species and grades.
How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.