Of course, but v1.x only supported gocryptfs. Also, new encrypted file systems may be added in the future.

DroidFS can open existing volumes. Just click on the “+” button in the bottom right corner, then on the folder icon, and then select the volume directory.

To type with only one finger, there’s 8Vim.

:help i_CTRL-H

 or CTRL-H  Delete the character before the cursor (see i_backspacing                                                       about joining lines).