Great software. Congrats!
GAIA GPS is one of my main go to apps for work and play. It live on my home screen. I use it out in the field for biological surveys, use it for route finding on cross county hikes, use it for recording exceptional campsites or unusual geologic formations, and use it to record and photograph archeological finds.
I work with staff from a variety of local, state, and national agencies and frequently use GAIA GPS in the field to illustrate a point. Now many of my colleagues are using the app on their devices for the same purpose.
The ability to layer maps, and store high resolution photos makes the pro version worth investing in, but $40 is a steep price to pay. Hopefully the good folks at GAIA will come up with another tier of pricing that allows more folks access to these features.