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This is a very basic question, I never programmed an app on Android:

I would like to program something similar to this app

Basically, there is a formula that generates a value based on different parameters/inputs that the user will enter.

I want to generate charts to show what would happen if we change one variable's value, while keeping the others equal.

do I only need Android Studio, knowledge of Java, and an Android charting library such as AChartEngine?