Tip: tap the keyboard microphone and just say what you need, e.g. “we need two milks, bread and a dozen eggs”, then tap Smart add.
Only invited people can sign in.
No password yet? Leave it empty and you'll get a sign-in email. Once you're in, you can set a password under People.
Use the code when the app is in your Dock or on your home screen: links in emails open in the browser instead.
Understands dates (today, tomorrow, Friday, next week, in 3 days, 31.10), a person (for Wiola, for me, for both), #part of a task name to put it under, and !high or !low. No date means tomorrow. Polish works too: jutro, piątek, dla Wioli.