Apps like Tuta: Secure Private Calendar

Here are some great alternatives to Tuta: Secure Private Calendar by Tutao GmbH :
Proton Calendar: Secure Events
Proton Calendar: Secure Events
★4.5
Calendar Planner - Agenda App
Calendar Planner - Agenda App
★4.6
The Family Core
The Family Core
★4.8
Seecrypt Enterprise
Seecrypt Enterprise
★3.8
OurCal: Shared Calendar
OurCal: Shared Calendar
★4.3
BotherMe&U Reminder Messenger
BotherMe&U Reminder Messenger
★4.0
EteSync - Secure Data Sync
EteSync - Secure Data Sync
★4.3
Simple Calendar
Simple Calendar
★4.7
Calendar Planner
Calendar Planner
★3.4
Calendar: Daily Agenda Planner
Calendar: Daily Agenda Planner
★4.6
Business Calendar 2 Planner
Business Calendar 2 Planner
★4.6
White Calendar
White Calendar
★4.4
Calendar
Calendar
★4.3
xx messenger
xx messenger
★3.3
Fossify Calendar
Fossify Calendar
★4.3
Calendar
Calendar
★4.3