Currently on the lichess ipad app, it's impossible to play with invisible pieces (blindfold). It is also impossible to create an ultrabullet challenge or tournament. It would be good if those could be added at some point :)
By the way, there are two other slightly annoying things about the ipad app:
1) Sound (e.g. for moving pieces) often doesn't work. From my experience, sounds only work if other apps are playing audio at the same time. For example, if I've got a music app playing in the background at the same time as using the lichess ipad app, then the sounds for moving pieces etc will work. But in all other circumstances, the lichess app never makes sound.
2) This one's probably really easy to fix. When you click on a tournament in the ipad app, the description is something like this: "Official • Today at 1:00 AM". It's only been like this for the last few weeks. Someone probably accidentally deleted a semicolon.
By the way, there are two other slightly annoying things about the ipad app:
1) Sound (e.g. for moving pieces) often doesn't work. From my experience, sounds only work if other apps are playing audio at the same time. For example, if I've got a music app playing in the background at the same time as using the lichess ipad app, then the sounds for moving pieces etc will work. But in all other circumstances, the lichess app never makes sound.
2) This one's probably really easy to fix. When you click on a tournament in the ipad app, the description is something like this: "Official • Today at 1:00 AM". It's only been like this for the last few weeks. Someone probably accidentally deleted a semicolon.