4 free iPhone apps for doodling on photos

A picture may already speak a thousand words, but sometimes it might just benefit from something extra. With this in mind, we've taken a look at iPhone apps that let you doodle and write on your images.  SEE ALSO: Taking underwater photos with your iPhone just got way easier We've tried and tested four free options that will help you get creative with your iPhone photos. Take a look through our selection and you'll be sketching on your best snapshots in no time.  You Doodle Image: YouD