Integrate http://instabug.com it's a very lightweight SDK that takes only 60 seconds to integrate & provides a lot of power to you. Users just shake the device to get the feedback form & send a message along with a screenshot of the app at that moment that they can annotate by drawing on.
App developers are notified instantly to login to their dashboard to check all of the feedback sent along with all of the important info about the device at that moment. Info such as ( Carrier - Memory - Storage - iOS version - console log ) & much more.
It's also a free service, I think it's worth a try.
For full disclosure, I work on the Instabug front end.
