Works with the calendar you already use

Pick one calendar for appointments

During setup you choose the calendar where your appointments live. It can be an iCloud calendar, a Google calendar, an Outlook or Exchange calendar, or anything else you have added to the Calendar app on your iPhone. Solo writes each appointment into that calendar as an ordinary event and reads it back the same way.

That means your Apple Watch, your Mac, and the Calendar widget on your Home Screen all stay current without a second sync step. There is no Solo account and no Solo server in the middle.

Your other calendars show up too

While you book, Solo shows the day's events from your other calendars underneath the form, so the dentist, the school pickup, and the soccer practice are right there when you are looking for an open slot. You choose which calendars are shown in Settings, and you can hide the ones that are only noise.

Sync that doesn't need babysitting

Solo refreshes in the background and keeps track of what it last saw in each calendar. Change an appointment in the Calendar app, move it from your Mac, or let someone on a shared calendar edit it, and Solo picks the change up on its next open.

A keyword for shared calendars

If your appointments share a calendar with other events, give Solo the keyword your appointment titles start with, such as “Massage” or “Cut”, and it treats only those as appointments. If the calendar holds nothing but appointments, leave the prefix off.