What makes a great calendar app?

Calendar apps are hard to pick because they look the same and present many of the same features, like the ability to time-block, add events, descriptions, reminders & video conferencing optionality. Here's what we believe make a calendar app brilliant:

Scheduling Functions - The best calendar apps should allow you to better plan meetings and events with people using meeting scheduling functions. This is becoming much more common and not every calendar app has it, but that's what makes them better. There's nothing worse than investing your time into a calendar app and using a 3rd party service like Calendly to book meetings. Two tools can become one.
Super Mobile Apps - Calendar is hard to get right on mobile thanks to the tiny real-estate when compared to a wide screen desktop display, so the best calendar apps make it easy and resourceful of the space on their mobile app version. Cracking examples are ones that make it easy to navigate between dates and don't overwhelm with features but deliver what's needed to view, schedule in and even plan meetings.
Increasing AI Abilities - There's more need for AI to do smaller errands in the background of your calendar apps. The more prevalent calendar apps will need and activate AI to do things like plan your tasks into your calendar, save time with suggested dates & recommend the best slots for you and people to work with. Less meetings and more focus time is the best motto.

Best Calendar Apps

Our top picks for the best recommendations on calendar:

6 Best Calendar Apps in 2025

6 Best Calendar Apps in 2025