Apps similar to Proton Calendar include Google Calendar, which is free for personal use. Other options are Tuta Calendar, Etar, Posteo and KashCal. There's no shortage of Calendar Apps like Proton Calendar, with more than 50 alternatives for the web, Android, iPhone, Mac and iPad.
Amie is a productivity application that facilitates task, event, and contact management, integrating a scheduling feature for task and event time allocation, and effectively transforming the calendar into a todo list, with color-coding for improved organization and visual...
Germany
EU
Merkuro is a calendar and contact application that allows you to manage your tasks, events and contacts. Merkuro supports both local calendars as well as a multitude of online calendars: Nextcloud, Google® Calendar, Outlook®, Caldav, and many more.
GermanyEU
HEY Calendar is a digital scheduling tool designed with a unique approach to managing time and tasks. It offers a feature that allows users to rename days according to their significance, such as designating a day as 'Travel day', 'Anniversary', or 'No work...
United States
Zoho Calendar is an online calendar that helps you stay organised. Zoho Calendar makes scheduling events & appointments, sharing team calendar, booking resources easy & effortless. With over 15 million happy users, we are equipped to cater for different needs - Personal...
India
Your calendar, on steroids. Enhance your productivity and organise your time with Vimcal touted to be the quickest and fastest calendar app ever.
United States
Web-based time-management tool featuring appointment scheduling, sharing, reminders, to-do list integration, iCalendar file import, collaborative options, multiple calendar creation, recurring events, and cross-device access for both personal and organizational use.
United States
Android calendar-app showing the weeks of the year (week numbers), 21 languages, syncable with Google Calendar:
GermanyEU
End-to-end encrypted sync for calendar, contacts and tasks. Integrates with your existing apps, data is encrypted on your devices before it ever reaches the server.
United States
Windows desktop calendar widget that brings your calendar to your desktop—always visible, always in sync, and built to keep your day on track.
United States
Rise Calendar is a state-of-the-art scheduling tool that utilizes a Scheduling Engine to pinpoint the best times for meetings and tasks that require concentration. Its unique focus blocks feature progressively limits access to your calendar as it becomes fuller, protecting your...
Calindori is a touch-friendly calendar application. It has been designed for mobile Linux devices but it can also run on desktop environments. Users of Calindori are able to check previous and future dates and manage tasks and events.
GermanyEU
Sweden
