The one on the left is just a circle. That's not a lot to go on. And there are literally millions of apps, so you will be very lucky if someone who knows these particular ones reads this.
To be honest your best bet is to just ask the owner. But since most of these questions are from people with relationship insecurities (apologies if you are an exception!) I will say that there's nothing about the design that screams "dating app" at me.