One thing that is important to determine is whether any of the off schedule populations (especially the 4-year early and 4-year late ones) are large enough to persist and lay eggs. The big question is will they establish a new population? Please send photos of cicadas laying eggs. And if egg laying is extensive enough to damage branches, please send photos of that as well!
Mount St. Joseph University has released a new app called Cicada Safari. Its purpose is to help you identify periodical (Magicicada, 17-year, 13-year, “locusts”) cicadas, and share the location where you found them. Scientists like Dr. Gene Kritsky, of Mount St. Joseph University, will use the data to determine exactly where periodical cicadas exist, in order to create maps for future generations.
Judging by screenshots of the app, it looks like you can 1) identify cicadas, 2) take a photo and share it, 3) map the location where you found it, 4) compete with other cicada scientists for the most cicadas found. Looks that way at least.
The app lets you submit cicadas photos of any species.
Not in the eastern United States, and looking for an app to identify and report cicadas, other creatures, plants & fungi? Try the iNaturalist apps.