Apps Like O'der stack for iPhone and iPad
O'der stack screenshots
Ranked alternatives
Showing 401–420 of 1,000 ranked alternatives.



GeoGebra Scientific Calculator
GeoGebra GmbH
Calculate and solve math problems
Perform calculations with fractions, trigonometric functions, statistics, and exponential/logarithmic operations. Use exam mode for test environments. Replace traditional calculators with this tool for math and science learning.



Developer Calc Hex Dec Oct Bin
DAI WEIJIE
Calculate in multiple number systems
Perform calculations with binary, octal, decimal, and hexadecimal values displayed simultaneously. Enter and view hex codes and RGB values on the same screen. Display up to 19 decimal digits. Toggle conversion reset on or off.


Ezy Triangle
Hoang Khanh Nguyen
Solve triangles with formulas and interaction.
The app solves triangles given three quantities and handles multiple solutions. It displays side lengths, allows interaction, and auto-saves triangles, including a list of formulas.






Triangle Calculator Pythagoras
Muhammed Samil DEMIR
Calculate sides and angles
Solve right-angled problems by entering known values. Calculate missing sides using the Pythagorean theorem or unknown angles with trigonometry. Provide step-by-step explanations for each solution.

CalcApp - Simple Calculator
尉 张
Calculate, convert, and solve equations
Perform basic arithmetic, scientific calculations, and programmer-specific conversions. Save results to a history log. Switch between different calculation modes and unit conversions.

Pythagoras HD
Roman Koksharov
Solve puzzles and explore proofs
Explore geometric shapes and their properties through interactive puzzles. Manipulate triangles and squares to visualize the Pythagorean Theorem. Discover multiple proofs through step-by-step construction and logical reasoning.

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