My requirements are simple: 1) I am able to search past emails and view them. 2) Able to "Mark as read" from the notification popup. 3) No ads My experiences are mixed: Fairmail, Aquamail (when it was good) , K9, Thunderbird and similar apps **satisfied ** 2) and 3). However, they all **failed** at 1). The searches either return nothing or take a long time to load. So I have to swap to a browser , go to Gmail then search from there. Outlook sucks at 3). Sometimes it gives me random ads within my inbox. It does 2) very well. For 1), it can retrieve the searches better than the group above , but not reliable. The Gmail app excels at 1), it fails at 2) and 3). The ads within the app are not that terrible, but stil very annoying. It's been years and we still couldnt "Mark as read" from the notification. Surprisingly, Gmail works for 1) all the time. Which one do you use?