Circle and Sphere app for iPhone and iPad

This app calculates all quantities of a sphere (body of a sphere, circle, all parts of sector and segment). Therefore you must enter some variables (like the radius of a circle and the central angle). The algorithm searches the formulas of the missing quantities, shows them and calculates the results.

Decimals and fractions are supported. The solution is shown step by step. All calculations are stored in the history. The final solution can be shared.

[ Content ]
- all important quantities for the circle and sphere calculation
- formulas for all important quantities of a sphere, circle, sector and the segment
- infographic to illustrate the topic
- search bar to find the desired quantity
- history function to save input
- detailed solution
- positive numbers, decimals and fractions are supported
- option to remove advertisements

[ Usage ]
- there are several fields for entering the values ​​using a special keyboard
- if values are missing, all fields are highlighted in orange
- if values are oppositions (like "r = 1 and d = 3"), one affected field is highlighted in red
- every value must be positive
- maximum of alpha is 360°
- beta must be less than 90°
- if a value is no number, it is highlighted in red
- the entries in the history can be deleted or sorted manually
- if you select an entry in the history, it will be loaded automatically for the calculation
- the entire history can be deleted by pressing a button
- solutions can be shared