@theSuess Why do I learn about this only now, and only from my random Google Search. You might have told me about it, but if you did I completely forgot. So, sorry about that.
Oh boy, this is really cool. I would like to help with the WebApp version, and maybe (if you decide) with a Hybrid app version (I could pick up React Native pretty fast I guess). Lets talk next time we see each other about this, I would really love to kickstart this project back up.
Btw, I found this app as well: https://play.google.com/store/apps/details?id=com.urbandimension.URBNJumpers&hl=en
Looks more polished and professional. At least from the screenshots. I will test both over next period of time and give you a full feedback round. :)))