Matrix Calendar is a free Android application developed by Pro Active App that offers a unique and comprehensive way to track and plan everyday tasks in one place. The app is available in 14 different languages, making it accessible to a wide range of users across the globe.

One of the most notable features of Matrix Calendar is its ability to track and manage events reminders, notes, moods, weight, contacts and birthdays, name days, moon phases, and to-do lists. Additionally, users can import data from Facebook and their phone's contacts to the app. The app also features a landscape mode that displays upcoming events for better organization.

The Pro version of Matrix Calendar includes more moods and skins, no ads, and name day notifications. However, the free version offers plenty of features to satisfy most users.