Time and browser
Ive had the app for a while and its OK but just recently the time stamps have been different Im not sure why but I tried calling and there is no support on the app only online support and I tried everything online already. The browser should be able to save your username and password I tend to use the browser in the app but I always have to login because it never remembers. And if Google can you should be able to filter your messages to delete A lot better in the app and to select all without having to take each individual one.
Wacccks about
Gmail - Email by Google