@Wilson75
personnaly, i use Android LocusMap and import all my activities in it, so that i have an offline and mobile repository of activities.
And in Locus, there is a simple way to search all activities near the center of the map position, and then just zoom and click on the track to open the one suits to you.
Once found, i can decide to open it or not in SuuntoApp depending on what i want to do with it 😉