Best iOS email app Ive tried...

I have tried pretty much all of the iOS alternatives to Apple Mail, and I keep coming back to Altamail. Its options are extensive. I would have to agree with several other reviews as regards the apps rather intense learning curve (For example, I still find Folder Aspects confusing when working with multiple accounts, and the Help area is too minimal). Would definitely appreciate some tutorials posted to YouTube. Still trying to understand many of the customization options. Needs more detailed Help section. I give it five stars because it seems like it can do just about anything one would need it to do. Now if I can just figure out how to configure all that potential.

Burnell about AltaMail Classic, v5.8.1