All blog posts on this site contain images with interesting metadata. The Photo Investigator is an iOS app to view all image metadata (all the possible data stored ABOUT and within each photo). You can also remove photo metadata with an in-app purchase. The Investigator can also open the image’s GPS location in the maps app for directions; view images at full size and zoom them larger than in the Photos App
Photo data may include location (if enabled by the camera which took the photo), date, device, software versions, file size, file name, camera settings, and more.
Daniel Anderson has published thirteen apps in the app store, with various others developed for clients.