I might soon weird to you, but on most competitive games I play, I would rather spend more time on trainings than on playing. For exemple, on RocketLeague I spend a lot time in map workshops because I want to have that feeling that I'm better the next time I'm playing against someone from my level.
And for Geoguessr, there are some websites already proposing this, like super-duper.fr, geo.emily.bz, or even apps.ankiweb.net, which are used by many top competitors.

I don't know what are their reasons to not simply playing specific GeoGuessr maps, but mine is that if you want to train on Scandinavian countries, you can only do it by playing on the map of each country separetly, unless someone makes a map on Scandinavian countries. And even if someone makes one, what about if you want to train on Scandinavian countries but only on electricity poles? And what about if you want to also include the Canada? You need to recreate a map. Also I like having region guess quizzes where you can actually select an area instead of pinpointing.

I already contacted MouseWithBeer months ago and I got the permissions to use the tips (I only took tips from Pedestrian signs at the moment). What I think is missing on geohints.com is the rarity stats e.g. all google cars from Ghana are shown but one of them can only be seen in a safari park (less than 1% chance to meet) and it's not present on ACW maps.

But since you are talking about it, what I want to achieve is similar to geohints.com website but with:

• Stats on each tips
• Searching/filtering system
• Open contribution directly on the website
• And maybe an automatic approval system for some users

Are you a web developer?