Quadratic Equation Calculator

My first venture into Android App development is this quadratic equation calculator.

It allows the user to enter a quadratic equation that can be solved.

Compatible on all devices from 2.2 to 4.4. It can be downloaded here:


The slider is used to round the number of decimal places. As you move it, you the two values updating “live”.

You can save the equation for loading later. This is done by either pressing Save under the slider, or by going to the “Load” screen and pressing save from there. I user a SQLite database to achieve this.

Above is the load screen. If the current solved equation hasn’t already been saved, you will be given the option to save it. You can load an equation by simply tapping the one that you want.

Long pressing an equation allows you to select multiple entries to delete. You can also use the clear button to delete them all. This was the hardest feature for me to implement!

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