On This Day is an Android application that helps you discover historical events that happened on the current day. You can also browse through events, holidays, observances, and famous people's birth or death anniversaries from all over the world by using the calendar option. The app is free to use and uses only up-to-date information added by Wikipedia users.

The app features tens of thousands of facts, and it loads related article pictures to make reading more engaging. Furthermore, tooltips appear when you click on a term mentioned in the note, and you can follow links to Wikipedia articles to learn more about a particular event. The app also allows you to share the most interesting facts with your friends and family via messenger or social media. The content is available in accordance with CC BY-SA 3.0, and the app makes use of the materials of The Free Encyclopedia.