For iOS should be relatively easy to add, but for android will require some hacks [http://stackoverflow.com/questions/13877681/how-can-i-add-a-hint-to-the-spinner-widget](http://stackoverflow.com/questions/13877681/how-can-i-add-a-hint-to-the-spinner-widget)
For iOS should be relatively easy to add, but for android will require some hacks http://stackoverflow.com/questions/13877681/how-can-i-add-a-hint-to-the-spinner-widget