Help us to have accurate user location

Hello,

I try to save automatically in my data base the exact latitude and longitude of the user when he complete a form. For example if he want to alert about a problem into a forest.
Actually I only have a nearby position. When I am testing my App I tried to complete forms from 2 points of my garden (over 15m between) but locations saved are strictly identic (my postal address) into Adalo data base ; and using Google Maps I can watch different coordinates…
I’m looking to obtain accurate positions.
Does somebody knows how to?
I search a solution since last week without result :disappointed_relieved:
Regards,