Google Calendar is the best free calendar mobile application for daily use of events, reminders and notes which will auto sync with gmail account.
Get the official Google Calendar app for your Android phone and tablet to save time and make the most of every day.
• Different ways to view your calendar – Quickly switch between month, week and day view.
• Events from Gmail – Flight, hotel, concert, restaurant reservations and more are added to your calendar automatically.
• To-dos – Use Reminders to create and view to-dos alongside your events.
• Goals – Add personal goals—like “run 3 times a week”—and Calendar will schedule time for them automatically.
• Quick event creation – Smart suggestions for event titles, places and people save you time when creating events.
• All your calendars in one place – Google Calendar works with all calendars on your phone, including Exchange.
Google Calendar for mobile download