I haven't seen an app (certainly haven't seen them all) that said I could trace a route on my computer (or tablet, whatever) and then have that route sent to a repeater-finder. If they've already done this, great. Now it is time to TELL PEOPLE they can do this.(G)
Sending the repeaters back to the map as POI or other information, would be of use in case you are, for instance, driving a thousand miles on the interstate. Or three thousand, Maine to San Diego. Do you want to scan all those repeaters for all those days? Heck no, if you could see what repeaters were around, you'd know who to select (manually) if you wanted to make a call, like "I've got a flat, where can I get lunch and a tow?" Or, even better, if the system could tell the radio at some point "Here's the list that's within 500 miles of you, just scan these now."
All trivial programming exercises compared to what computers have been doing for the last 20 years.
It's like the way hams go all wild over FLDIGI. Yes, it is nice. yes, it is a good tool. yes, kudos to the many who put in long hours doing the donkey work to make it work so nicely. But the heart of it, is that it behaves just like the 300 baud acoustic modem couplers we used in 1980. (I just KNEW I should have kept one of those, that it would come in handy again someday!(G)
If Gasbuddy can show me every gas station along a 3000 mile trip, in real time, then why shouldn't a repeater-finder do the same trick? (And for that matter, Gasbuddy still can't figure out "that's on the wrong side of the road, don't ask me to drive back where I came from for two miles."(G)