Dato

Dato replaces the macOS menu bar clock. Click it and you get a month calendar with your actual events, the next meeting with a join button for its Zoom, Meet or Teams link, and as many extra time zones as you have colleagues in other countries. The clock itself is formattable down to whether you want seconds, the week number, or the date written out.

It reads whatever calendars macOS already knows about, so there is nothing to connect and no second copy of your schedule anywhere. You can add and lightly edit events from the dropdown, but this is a companion to Calendar, BusyCal or Fantastical rather than a replacement for one.

$18 once on the Mac App Store, and Sindre Sorhus puts the terms in the listing itself: a one-time purchase with free upgrades forever, and it will never be subscription-based. That sentence is the reason this entry sits on the front page. Written commitments like it are rare, and the app has been shipping updates under them for years. There are no in-app purchases and nothing degrades if you never pay again.

Mac only, with no iPhone version, so what you buy is the whole thing. If you are happy with the stock clock and open Calendar when you need it, you do not need this at all. If you check what is next a dozen times a day, $18 stops being a decision.