when I use maximum power saver mode for a long period of time after changing this mode the external installed apps don't perform well. after restart only installed apps functioning smoothly
which using new OS oreo 8.1.0 on my Samsung Galaxy J7 prime handset android system has taken more battery charge when compared android OS. when I was using 7.0 OS it was in reversible order
kindly update your calculator on Samsung Galaxy J7 Prime. I changed to OS 8.1.0 square root symbol missed in your calculator and also it failed to provide scientific calculator too.
