Rispondi a: Stuck on "Android is starting... Optimizing app 1 of 1."I have been struggling with this for the last couple of days, finally found the culprit after removing all of the suggested apps on this board to no avail. For me it was MYFITNESS PAL. Restarted with no delay, even tried to install it again to test it and it took 20 minutes to install from the play store. Immediately deleted it as it was the obvious problem. I'm running Android 6.01 on an S6 if anyone cares to compare.