By the end of December we want to launch publicly and try to find new users.

Must have

• Mobile apps
• Some way to track early users, for when we introduce subscriptions
• Error tracking (Sentry or similar)

To verify

• Proper support for multiple timezones (what happens on DST? when users are on different timezones? ...)

Nice to have

• Identity linking - since email addresses and phone numbers can both be used to invite other users, it would be reasonable to let users have more than 1