I use my Blackberry to quick read / reply to email on the go. I allow it to delete emails so it's set up to be my primary email manager. For longer emails I need to write, I use my laptop or iPad, since I got a keyboard.
I'd like a mail app that can handle gmail's other features such as multiple sign-ins and delegated accounts. Supposedly Gmail's app handles multiple sign-ins but I couldn't get it to work. (new iPad, OS 5.1) Also, I tried the Gmail app and it didn't reflect my delegated account.
I'm testing Ginbox right now. It's a free app with ads and uses the google interface, so it accesses everything google. The thing that's weird about it is that there's an option to stay signed in. When you switch from one account to another, it automatically signs you out, then when you switch back it signs you back in. It's not exactly what I'm looking for.
I'll now test the safe gmail app. And if that doesn't work for me, I'll look at the paid options (ibis & igmail HD). Heard a lot of good things about Sparrow but when I searched for it in the app store, it was available for my ipad.
Just downloaded and tested: safe gmail and ginbox are similar. My search continues