A free app for Android, by Art Photo Studio.

“Timestamp Camera: Date Time Location” is an application that allows you to add a date, time, and location stamp to your photos. It is the most convenient and useful way to keep a record of the events that you have been involved in, the places you have visited, and the things you have seen. You can add a date stamp to your photos to remind yourself of the event or the place you were at. You can also add a time stamp to your photos to indicate the time that the event or place happened. You can even add a location stamp to your photos to remind yourself of the location you were at.

The application is very easy to use, and the best part is that it is free. You will not need to pay a penny to use the application.