That’s WhatsApp, which I don’t use with providers because it requires a real telephone number. I got burnt by a “provider” by using my real number some time ago, and so since then I use an app. I haven’t had issues. I use it too call too.
In RM Messener though, ✔️✔️ means the guy has looked at the message. Let me be clear, I’m all about giving folks leeway. I know I’ve opened texts and things are going on and I forget to answer. That happens. But when it’s the opening overture and it goes unanswered as is the friendly followup, that gets under my skin and any grace I may have had evaporates very quickly.