You can share this webdx app e.g. in a Delta Chat group. Every group member can read and change this memo.
Use it e.g. to keep all relevant dates in one place if you plan a meeting with your friends ;-)

You have just to run "create-xdc.sh"
The created "Memo.xdc" can now just sent in your Delta Chat group or also in every single Chat.

Every user have to use a Delta Chat App. Webdx Apps works not with regular Mailclients