Google Calendar
Google Calendar is an excellent and above all 100% free tool for individual and group planning. Staying true to Google's design philosophy, the app displays your events throughout the day on nice, big, colorful cards. It seamlessly integrates with the full suite of Google apps like Gmail, Meet, Maps, Drive and more. So you can easily add flight reservations or online meetings to your calendar from Gmail. Events, reminders, tasks, etc. can even be set as recurring events.
Fantastical
The Fantastical application is considered by many to be the absolute top among calendar applications. The app has a very well designed main screen and displays all your events and reminders in a clear looking table. It also displays the weather forecast by default. You can view the tasks to be completed right next to the events, and natural language support for creating events and reminders is also a matter of course.
A
Any.do is a wonderful task management, reminder and calendar planning app for iPhone. It has a clear and miniminimalist interface that doesn't overwhelm you with unnecessary features and shows you the essentials at a glance. It's a well-thought-out calendar app for users iOS, which has all the features you need. The list includes location-based reminders, recurring events, creating events using natural language, and much more. Any.do also integrates instantly with native iOS applications such as Reminders or Calendar.
Calendars 5 by Readdle
The Calendars 5 by Readdle application offers the ability to synchronize with Google Calendar, iCalendarCloud, Google Maps and Maps Apple. It boasts a sophisticated, clear user interface, is cross-platform, offers support for natural language input, the creation of recurring events, a task manager and much more.
timetree
TimeTree is one of the top rated calendar apps in App Store, which is popular for its advanced features and fantastic sharing capabilities. When you open the app for the first time, it prompts you to choose a calendar type – Family, Relationships, Work, Friends, or Personal. After selecting the purpose, you will see a sleek and beautiful interface that displays your events. You can seamlessly sync other calendars on your device, such as Calendar Apple and Google Calendar. In addition to easy calendar sharing options, the app also lets you chatand discuss important details about events and tasks. You can also share notes or use notes for events that don't have a fixed date. You can also pin important events so you never miss them when you're planning or rescheduling other events.