For the past 2 years I have used K9 as my mail app on my unrooted Nexus5 and have had the gmail app disabled. I dislike the gmail app because it keeps hiding emails in obscure folders. Since the gmail app update to access microsoft exchange I am nagged daily to update the app. To do this I must enable the app and then perform the update. When I then go to disable the app it reverts back to factory condition and the nagging starts again. Is there any way of stopping this without rooting and uninstalling the app?