Like I wrote before - let it drag them away from geocaching. When they grow up and understand what is it really about they can join. I'm 31 now and I'm (among other things) using geocaching to explore areas near my home town that I ignored or wasn't aware of when I still lived with my mom (so till being 19). This comes with age and experience. No need to rush
In the mean time it will boost our stealth mode in the crowded areas. Now everyone will think we are looking for Pokemons
Well, you're missing my point. I'd like someone to go with geocaching. They are 16, 19, and 44. The thrill of the hunt is good. But after that, it doesn't feel modern. It feels like something you'd go do with grandpa to humor him and spend a few hours with him.
Geocaching needs to feel more modern. Just because it's been this way for 16 years doesn't mean it always should be.
PG is so good because you walk around, you find it, you get it and you get instant logging and feedback. No back and forth with screens. No tabs for info. Just info and feedback. That's a little simplistic for GC, given the complexity of locations, but it's worth a look for the developers.
There is a legion of us playing GC who use our phones and will never own a separate gps device. GC could make some money off of us selling enhancements in the app.