Follow along with the video below to see how to install our site as a web app on your home screen.
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Notifications on the left you can usually check by pulling down the notification slide.
Do you suspect it might be a dating app or something on a partner's or friend's phone? It's not a heart anyway.
Font-wise it resembles the S that Samsung use in many of their app names, but as I don't use any Samsung apps even on my Samsung device I can't be sure what notifications they produce.