Hi WildWortWechsel, I've just realised that I had that 'ping' sound when uploading photos on my new mobile phone at first too. I was able to turn it off in the Android settings like this:
Apps > Locus Map > Benachrichtigungen (dort zu Laufende Dienste scrollen) > LoPoints Fotos OFF.
See screenshot:
Apps > Locus Map > Benachrichtigungen (dort zu Laufende Dienste scrollen) > LoPoints Fotos OFF.
See screenshot:

