HoldMyTrack

HoldMyTrack keeps the outdoor journeys you choose on one map. Upload files exported from Strava, Garmin or other services, sync from Health Connect on Android, or record a track in the Android app.

See every track at once, clear a Fog of War wherever you've been, or view a heatmap of the last year. Group activities into Stories with their own map, totals and photos, and collect Spots such as viewpoints and waterfalls from OpenStreetMap.

It has no feed or followers, and it doesn't read or store health data. It's free and open source, and you can download all your data. There's a demo account, so you can try it without signing up.