A great calendar is like a great personal assistant, keeping your days flowing smoothly.
Without them, most of us would miss appointments, forget birthdays, and disregard deadlines.
But no single calendar app is best for everyone.
Everyone’s workflow is a little different, and our scheduling needs vary.
Some want their calendars to be simple and streamlined; others prefer robust, customizable calendar apps that track tasks and notes alongside events.
Your phone and computer already come with a calendar app—but there’s an ocean of alternatives that might be better for you.
We surveyed that ocean and tested many of the best calendar apps available to help you find a digital assistant for your busy life.
Here are the best tools for tracking events, organizing your day, and sticking to a schedule.
Quick Reference Guide: Download a free PDF “cheat sheet” offering an overview of all 40 apps in this post.
Download Zapier’s Calendar Apps Cheat Sheet
Download in PDF Format
Ed note: This post was updated to include Outlook.com
What Makes a Great Calendar App?
Calendar apps have two core functions: They show your upcoming schedule and remind you of important events.
The best calendars, however, aren’t just functional—they’re actually fun to use and help make you more productive.
For this roundup, we looked for apps that were:
Easy to use: If adding an event requires excessive clicking, tapping, or menu exploration, chances are you won’t enjoy using it—if you even use it at all.
If you can’t find an upcoming event quickly, you’re also in the weeds. Intuitive, fast apps are the best apps.
Aesthetically pleasing: A beautiful, uncluttered user interface (UI) makes checking your calendar several times a day a pleasant experience.
Beyond good looks, the design should help you tell different kinds of events apart and get a bird’s eye view of your schedule.
Simple to share with others: Your calendar events probably involve other people.
If you’d like to keep everyone on the same page for those meetups, sharing features—such as easily inviting others to see your calendar or subscribing to published calendars—will be a huge help (and much better than back-and-forth email discussions when planning a date).