How do you guys make any money?
I've really had my "moneys worth" from this amazing app. I do try and contribute with discussion and good bug reports in return. But really $A9 for the app (lifetime license on any # devices) and few little $'s for OSM maps. You really have to sell a lot of apps to support your ongoing development. Some apps have Google Play "donate" buttons. Have you considered this for extra income? Or splitting off significant new functionality into separate paid modules. The proposed 3D functionality may be a good candidate for additional payment. It could be a killer feature. I struggle with the gradient graphs trying to "optimize" & visualize a cycling route that won't needlessly go up steep hills, and 3D functionality could make that task far more reliable. I'd be more than happy to pay to support further development. Garmin maps, of which I've bought a few, cost me $100's each, and they are locked to a single GPS. 10 years ago an equivalent Windows PC GPS program would have cost $1000's.