Odia Calendar 2021 is a free Android app developed by Appsoniac under the Education & Reference category and Books subcategory. The app features high-quality monthly images that display maasa, vaara, thithi, and nakshatra information for all days in the year 2021 in Odia language.

One of the main advantages of the app is its user-friendly interface. Users can easily select any month by swiping left or right and access a zoomable and colorful calendar that displays the list of festivals and holidays in Odia for every month. Additionally, the app also provides marriage and Brata dates. The app has a nice UI and is small in size, making it a better user experience for its users.