While I believe there is no one metric or indicator to look for, there certainly is a few ways to think about launching. In my opinion, most people view "launching" as a way too broad concept and don't do any distinction between the different stages you are in. I suggest you launch it many times. e.g As soon as you have a somewhat working app solving one job/problem, launch it. This launch probably won't mean that you do paid promotion or anything like that, but rather reach out to people who you've identified before and know that encounter the problem your app is solving. You basically launch to get feedback. Based on that feedback you then create the second launchable version, which hopefully solves the problem already quite well, is not the most terrible to use etc. For this, if you feel confident enough you can make it available online (self-serve sign up). Attract people from relevant channels to sign-up and try to gather as many learnings as possible (based on quantitative + qualitative data). You can launch it here at Product hunt. There's plenty of stuff already written about it so not going there. Once you know that you've eliminated the biggest obstacles from self-service signup and on-boarding flow, then it might be a good idea to start driving traffic to your website with paid efforts. So in a nutshell, I'd say you should launch multiple times with different approaches and goals in mind. Based on my own experiences, better to launch more times and earlier. This way you eliminate riskier assumptions and are able to do better informed decisions around product & distribution channels. Hope this helps! All the best with your upcoming launch!