Apple's iOS 27.2 beta introduces an anniversary reminder feature within the Call Context system, alerting users when they call someone on their anniversary date if the date is saved in Contacts. The feature builds on Call Context, which already surfaces relevant information like flight confirmations during calls, and can be managed through the Contacts app or Apple Intelligence.
ProtonSync enables synchronization of Proton Contacts and Calendar with Android native applications, offering an open-source and free solution.