Two apps for making things.
Studio for songs, Autor for books. Both keep your work on your own devices and ask for no account.
iPad and Mac · in testing
Studio
A jam app for people who play a MIDI keyboard. Plug in, play, and Studio records what you play and plays along with you. No mixer, no setup.
Mac, phones and tablets · in testing
Autor
A writing app for books. Your book is a folder of plain files on your own disk, kept safe while you write and readable without the app.