Another enormous hole in app privacy is that mobile devices tend to store location and compass bearing in addition to handset model in every photo taken with the camera.
So if you run a web or mobile app, scrub these on receipt by re-rasterizing (load .jpg/png -> copy image data -> save to a new file) using something like ImageMagick.
So if you run a web or mobile app, scrub these on receipt by re-rasterizing (load .jpg/png -> copy image data -> save to a new file) using something like ImageMagick.