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 361–380 of 1,000 ranked alternatives.


JicoCalc - Calculator
Shanghai Mashang Yunxing Technology Co., Ltd.
Convert units, calculate formulas, solve equations
Offers basic and scientific functions for daily tasks and complex computations. It includes unit converters with 41 categories, allowing users to drag and sort units, switch base units, and perform accurate calculations.

Right Angle
Jerry Mayers
Solve geometry problems without a notepad.
The app calculates properties for triangles, trapezoids, and circles. It accepts various input formats for angles and lengths, displaying results in the chosen format.





Vulcan Materials
Vulcan Materials Company
Calculate material needs for projects
Estimate construction material quantities for building and paving projects. Input job parameters like length, width, and thickness. Select material properties such as density from predefined options.

ConvertCalc
Michael Riehl
Convert units and calculate values
Allows users to perform calculations and unit conversions within a single . It supports over 200 units across various categories. Users can input equations, view results, and convert units instantly.









The Board Feet Calculator
Dundridge LLC
Calculate wood measurements and cut lists
Perform calculations for wood projects. Input measurements and materials. Estimate costs and quantities. Save and share project notes. Convert units and access formulas.


BA II Plus Calculator
国栋 焦
Calculate TVM, amortize loans, manage cash flow
Solve time-value-of-money calculations and generate amortization schedules. Perform cash-flow analysis and compute NPV and IRR. Calculate depreciation using four methods. Calculate breakeven, profit, and percent difference.
How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.