Moodlondon review for Loox ‑ Product Reviews App

Best Review app I have used. The only thing I'd say is... (and i know this may defeat the point) I would like to have the option to provide a discount for a 4+ star review even if the customers hasn't posted a photo. Reason being, poeple do everything on the go now so they might want to leave a quick review whilst on the train for example but not in a postion to take a photo, then later forget. If im being blind and this feature is available please let me know. Thanks