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
Convert units across categories including length, weight, speed, and volume. Switch between metric and imperial units. Perform calculations for conversions and save frequently used values. Share results via copy or email.
Perform length calculations, determine fittings angles, and estimate material requirements. Access schedules, standards, and industry-specific data. Convert units and calculate pressure drops. Save and export calculation results.
Perform complex calculations with scientific, engineering, and hexadecimal modes. Use RPN and multi-line display. Convert units and access constants. Undo and redo actions. Sync with Apple Watch for on-the-go calculations.
Arc+ calculates radius, length, width, height, and tangent by inputting two known values. Converts between measurement units. Saves results to a favorites list and shares them with others.
Find nearby stations with details on available services like WiFi, food, and restrooms. View distance in miles, tap to start navigation, or send route directly to vehicle.
Convert lengths between metric and imperial units. Switch between meters, centimeters, inches, and feet. Input values manually or via voice. Save frequently used conversions. Share results via copy or email.
Convert units between different systems with accurate results. Select units from a comprehensive list, input values, and receive instant conversions. Support multiple categories including length, weight, temperature, and more.
The app simplifies unit conversions across multiple categories. It provides a user-friendly interface for everyday use and includes optional currency conversion features.
Calculate materials for and brickwork projects. Estimate blocks, bricks, mortar, concrete, and gravel needed. Input wall dimensions in various units. Use calculators for area, volume, and retaining walls.
Calculate lengths for 1/4 Wave ground plane, 5/8 Wave Verticals, Dipole, and Inverted Vee types. Input desired TX or RX frequency to determine resonant wire length. Adjust for close resonance without an ATU.
Track speed and distance in miles and kilometers. Monitor real-time speed and display maximum and average speeds. Check speed limits and receive warnings for speed and red light cameras. Access offline maps and view weather conditions.
Distances between two or more points on a map. Place markers to calculate straight-line distance. Sum total distance for multiple locations. View distance in kilometers or miles.
Convert units across 20 categories with over 400 options, including mixed units like feet and inches. Add widgets for quick access. View conversion history and share results.
Track speed and distance in miles and kilometers. Display maximum, average, and current speed. Show road names and speed limits. Receive speed camera alerts. View weather information. Sync with Apple Watch. Display odometer readings.
Measure lengths of objects up to 9 inches using your device's screen. Choose between inches or centimeters. Adjust measurements to include the device bezel. Tap two points to get precise distance readings.
Measure distances and angles using augmented reality. Customize ruler settings and save measurements. Access tools for drawing, scaling, and converting units. Share measurement data directly.