We would like to be able to display an item count in the legend while using ArcGIS Online Web maps. If you change the style of a feature class you can see the COUNT column that displays how many of each item there are, but you can't force it to show in the legend. ArcGIS Desktop already offers this feature, so the users are used to seeing it on printed maps.
Pic on left is Style options (with count) and legend is on right.
I might be able to do this in an app, but I need it to work in a web map so that collector can use the same map