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 221–240 of 1,000 ranked alternatives.
UnitToUnit - Simple Converter
Michael Fiedler
Convert units and currencies instantly
Convert units for length, weight, temperature, volume, area, speed, energy, time, and more. Switch between currencies with real-time exchange rates. Input values and instantly get accurate conversions. Share results via copy or social media.
VisConvert - Conversion
Arch Square
Convert units across 14 categories simultaneously
Convert units across multiple categories including length, mass, volume, temperature, area, time, plane angle, pressure, frequency, energy, speed, fuel economy, data transfer, and digital storage. Open and manage multiple converters simultaneously.
Board Foot Calculate
阳 孙
Feet of lumber
Feet for single or multiple pieces. Input dimensions in inches or feet for thickness, width, and length. Determine total footage and cost by entering price per .
GeoGebra Calculator Suite
GeoGebra GmbH
Graph functions and solve equations
Graph functions, equations, and curves in 2D and 3D. Calculate derivatives, integrals, and roots. Create tables of values and solve equations. Construct and analyze polygons, circles, and conics. Use Augmented Reality to explore 3D objects.
Storypie: Education & Stories
Rolling Hills Imaging LLC
Learn through audio and interactive lessons
Create interactive with audio narration and illustrations. Generate personal adventures with customizable characters and settings. Include printable coloring pages and optional text prompts for storytelling. Share digitally or print for offline use.
AppBox: Useful 16 Apps in One
AllAboutApps
Track battery, manage dates, convert currency
Battery monitor tracks device charge level and health. Currency converter switches between 195 currencies and 3 precious metals with manual or automatic rate updates. Date calculator determines days between two dates.
Stair Stringer
H3Apps LLC
Calculate stairs, adjust measurements, determine steps
Calculate risers, run, angle, length, step height, tread depth, and number of steps. Adjust parameters for customization. Switch between Imperial and Metric units. Email or text results as needed.
Unit Converter -- All In One
Foodmatesss Limited
Convert units with precision control
Convert units across categories like Clothing, Area, Weight, and Temperature. Select base and target units. Adjust decimal places for converted values. Perform quick and accurate conversions.
Harvest+
Harvest Christian Fellowship
Track devotionals and connect with faith communities
Access sermons, live events, and feature films for spiritual growth. Explore interviews and content from Harvest’s 50+ years of ministry. Subscribe to newsletters and set reminders for daily devotionals.
AZ Calculator: AI & More
Gerardo Arellano
Calculate, convert, and solve instantly
Perform calculations with a scientific calculator, convert units, and use health tools like BMI and body fat calculators. Access financial calculators for loan and investment estimates.
The ULTIMATE Unit Converter
Sherzad Kalaf Mohe
Convert units across 20 categories
Convert units across 20 categories including length, temperature, volume, and mass. Input a value, select units, and instantly convert. Supports 190+ units for precise measurements. Syncs with devices for consistent use.
How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.