On This Spot is an Android app that provides users with a unique way to explore historical sites. It offers a collection of curated historical walking tours along with a camera and image editing tool that allows users to create their own "then and now" photos from a large collection of old photos at the exact spot they were taken.

The app is free and falls under the Education & Reference category. With On This Spot, users can explore the history of their city, learn about historical events and people, and discover new places they may have never known existed. The app is easy to use, with a simple interface that allows users to navigate through the tours and access the camera feature with ease.