Getting Fantastical 2 up and running on your watch can be time consuming, but it’s worth it: one of the very best iPhone calendar apps around develops even more powers when you add its app to your watch.

You can also add it as a complication, which means you’ll see details of your schedule right there in the watch face.

To actually make it work you’ll need to install Fantastical to your watch and then open the iPhone app, not the Apple Watch one. This is where you specify what information should be sent to the watch, and the options are extensive.

You can choose from events, calendars, reminders and lists, include a map of the event location, show end times and specify how reminders should appear, and you can even specify what should happen if you tap on the Fantastical 2 complication on your watch face.

It’s that kind of thought and attention to detail that makes us love the app so much.

The best thing about Fantastical 2, though, is that it understands you. Force Touch the app, tap on Add Event and Siri starts listening.

It knows what you mean by “lunch with Dave”, automatically putting the appointment at 12 noon, and it knows that if you say “to-do get dinner on the way home” you’re adding an item to a to-do list. Siri’s voice recognition performs brilliantly when it’s limited to such a specific set of instructions.