We have depended on googlemaps for finding our way during most of our travels. However for hiking on Eua, Tonga the only map that you will need is maps.me.
In fact please don’t use googlemaps unless you are a fan of getting lost. There are very few trail signs (if any) and trails intersect nonsensically throughout the island. Somehow maps.me plots out the perfect route showing each little turn. I was truly amazed at their accuracy.
Another helpful resource for hiking on Eua, Tonga is this brochure listing all the hikes.