Probably a collaborative note taking app that syncs across all devices 

 Note taking/journaling app
Uses a small set of relays to store encrypted, structural information
Said information can be a list of todos, basic notes with a heading, or tables of schedules to manage a project
All those objects are organized into a tree-view to keep topics separated
Although they are stored on relays, this is merely for backups. They actually connect p2p with the user's devices for instant syncing. 

 like standard notes. e2ee notes across devices 

 Blue sky background
You’re presented with a piece of blank white paper.

You note on it.

Publish.

The paper folds like a paper plane and flies away.

You can scroll the sky at will and grab /click on paper planes, reading the content in black and white. 

You can reply to a paper plane and it will fly together/in formation. 

No user info is displayed. But you can fold the paper plane back to a sheet to reveal who said what etc. 

 Wow this sounds so cool 😎 

 Funny what associations one gets when thinking about specific words/names.

Ty for sats🚀🧡 

 This sounds so incredlbly awesome!
A great timekiller, superb way of exploring global, and really pretty. 

 Yeah I also thought it would be calming. Simple, pretty, floating and flying planes. Maybe rain, thunder and lightning when zaps are received? 😂🤙🏻 

 Only air notes. No replies. Intentionally confusing, but fun on occasion.  

 🤔 

 I like that. Maybe one note per view at a time, swipeable 

 I’m working on a client that does this. Flat threads, though, not air notes. Feels like Instagram for notes. 🤓 

 I just designed something I have in mind :) 

 You’re a machine 💪 

 wasn't there some sort of a client that did one note at a time 🤔

interesting idea tho 💜 

 Short burn after reading style communication.

Maybe only let note live for x hours/mins