Thank you for contacting us. We would like to offer our apologies for the inconvenience caused. Unfortunately, the supported iOS version for the plugin is 7.0 +. This constraint derives from the native Telerik UI for iOS controls that work under the hood of the AppFeedback plugin.
You are right that this was not mentioned in the AppFeedback documentation. The article
is already updated.
Please, let us know if we may be of any further assistance.