Hi, I think you have a very niche product.
You may want to broaden the app’s functionality to handle clubs, and teams for example.
I’m not a hunter but I am a competitive tournament Archer so i do get exposed to the bow hunting market quite a lot.
Here in the UK Bow Hunting is illegal but there is a bow hunting association, the British Bowhunters Association. However, they do not issue tags / passes as members have to travel abroad to hunt.
I would say the American market is by far the biggest hunting market, just for bow hunting alone it’s probably larger that any european market. Factor in firearms hunting and the USA is a huge market. https://www.archerytrade.org/news/survey-says-18.9-million-archers-are-active-in-u.s
As far as i know in the USA it’s the individual States that issue tags/passes so they probably have tried and tested systems. However, maybe yours is better?
I know some other European countries do have (Bow) hunting, as does New Zealand.
In the USA I know hunters do congregate in online communities and form ‘Teams’ that compete against each other every hunting season (sorry I don’t know the mechanics of that). So maybe looking at the USA market may give you some ideas how you might expand your product to fit a bigger market.
I think if you want any sizeable income you’ll probably have to translate to English and go beyond Spanish borders. You’ll probably need an easy way to translate in to other languages too.
Also hunters have their own language/jargon/terms just like any niche and given recent high profile stories (Cecil the Lion etc) they tend to be much more guarded especially those who are obvious ‘outsiders’.
Hope this helps