imranqadri, Mar 12, 2019 : As Oneplus focuses to be a user friendly phone with easy to use OS, so the same should reflect in its stock apps as well. I believe the Calculator App should be simplified a bit from Functional Calculation to an ordinary calculation where a user don't need to press "=" sign to have an effective result. It'll be good for a basic users. While if someone need functional calculations they can go to play store to install more complex calculators or if they are must to be entertained then it should be added as a option to choose from ordinary calculation to functional calculation. A humble suggestion for making things simple.