Bring your images to life with these useful iPad apps. Using these apps will enable you to annotate your photos the way you want. You can highlight text in an image, add shapes and text, take notes and many more. In the case of Thinglink, you can add a layer of interactivity to your images by linking parts of your visual to videos, notes or music from YouTube.
http://www.educatorstechnology.com/2017/05/3-very-good-apps-for-annotating-images.html