Alevel Physics Calculator

I am a school physics teacher. This App, Alevel Physics Calculator, is coded for my students. It may also benefit those who need a quick access to some frequently-used physical constants. Features: 1) No buit-in advertisements 2) Quick access to some popular physical constants 3) Allows to review, modify or reuse previous 20 calculations 4) Allows equation to be typed in its natural order Feedback is welcome. Hope it helps you at work. Happy Calculation!