Calendar and contacts on your phone, and the iPhone

Thunderbird for Android is a mail app. It has no calendar and no address book. You put your Nextcloud calendar and contacts on your phone with other apps. They show the same appointments and contacts as Thunderbird on your computer, because everything is stored in your Nextcloud.

Android

Use DAVx5. This app puts your Nextcloud calendars, contacts and tasks into the standard apps on your phone, such as Google Calendar, Samsung Calendar and Contacts. Thunderbird for Android then also uses those contacts to complete addresses, if you have given the app access to your contacts.

You can read how to set up DAVx5 step by step in Calendar and contacts on Android with DAVx5. For your tasks on Android, see Tasks on your phone: Reminders on the iPhone, Tasks.org on Android.

iPhone and iPad

Thunderbird is working on its own app for the iPhone and iPad. On 9 November 2026 it was not yet available in the App Store. Until then, use the built-in apps:

• Your mail in the Mail app: see iPhone and iPad.
• Your Nextcloud calendar and contacts in Calendar and Contacts: see Calendar and contacts on the iPhone and iPad.

Not working?

Are your appointments or contacts not showing up on your phone? Read Calendar or contacts not showing up on your phone.