Bubble vs Flutterflow or else for webapp

I am thinking of building a webapp as a fun side project and since I no nothing about coding I wanted to dive myself into no-code. Before I waste time I would like to understand which of these tools is best for my use case. The main feature of my app is a one-to-one voice chat room where people are paired into (works a little bit like omegle, but only voice). You will get paired into another chat after 5 minutes automatically except when both people in the room press a "keep talking" button. I think other functionalities like simple forms and a built in translation tool (for single words) should be able to be added without a hassle in both no-code tools. BUT the chat function is the bread and butter of the webapp. Since it's a passion side project I really want to invest the time in one of these tools and not outsource it to a developer. Any ideas how I can bring my idea to life? (Without having to learn to code)