Kindle (on iPP 10.5). Have long stopped using my original Kindle e-reader and Paperwhite in favor of the iPad. This is my most-used app, hours per day.
FileBrowser, both for on-board file management and access to off-line storage.
nPlayer, Netflix, and Prime Video for movie & video watching.
Picture Manager Pro for on-board photo storage/viewing.
AltaMail for email - has full-page (no sidebar) reading in landscape mode.
I'm retired so the iPad is primarily a consumption device for me.
FileBrowser, both for on-board file management and access to off-line storage.
nPlayer, Netflix, and Prime Video for movie & video watching.
Picture Manager Pro for on-board photo storage/viewing.
AltaMail for email - has full-page (no sidebar) reading in landscape mode.
I'm retired so the iPad is primarily a consumption device for me.