Create an account from the desktop app
Signup started in the desktop app runs in Aden's own window and hands the finished account back to the app, signed in.
What it is
You can install Aden for desktop before you have an account. The sign-in screen has Create an account: it opens Aden's signup page in a window of the app, so you never leave for a browser tab you then stay in.
Sign up as usual, including email verification and the setup wizard, and the last step asks whether to continue in the app. Choose it and the app is signed in, no password retyped. Stay in the browser instead is there if you would rather keep working on the web; the app then waits on its sign-in screen.
Use my browser on the sign-in screen sends the same signup to your default browser, for a password manager that only lives there. It comes back the same way.