This is a free version of "Science Formulas PRO", if you want the ad free version and more features search in the android store for "Science Formulas PRO".
This app is ideal for students and graduates, you will find a variety of useful formulas and tools for your daily calculus, you can enter a value by touch and solve any variable of the equation, the interactive feature of the formulas makes it easy to avoid typing or human errors.
In this modern scientific calculator there are more than 250 (equivalent to more than 900 because of the inner variables calculus)formulas and tools covering various topics like: