With Calendars Pro, you have seamless access to all Pro features in your Pro plan across your devices on your Mac, iPhone, iPad, and Apple Watch.
Once you purchase the subscription, you can start using all premium features without any limits across your iPhone, iPad, Mac, and Apple Watch — all for no extra fees. For this, you just need to install the app on your device while using the same Apple ID you’ve purchased the Pro subscription with - this will unlock the Pro tools across your devices. This is especially convenient if you have several different Apple devices in your daily rotation and need to keep everything in sync.
It's important to remember that Calendars is not a standalone app — it works as a mediator between your calendar service (such as Google Calendar) and your device. This means you'll need to connect an account for it to sync your calendar data, as the app itself does not store any data independently.
To ensure everything syncs properly across platforms, you will need to add your calendar accounts manually on each device.
Learn how to add your calendar accounts to the app in this article.