“I also have this other channel that we didn't talk about so I was building my apps in public and I have actually grown a following on X and nowadays LinkedIn... I got this email list thing on my to-do list”

Build in public, but also build an email list

Sebastian's X/LinkedIn audience is his insurance policy: if HabitKit's ASO ranking drops, he can announce a new app to followers and get a launch boost. But without an email list, he has no way to re-engage existing users directly. Building in public creates a community safety net; building an email list converts that community into an owned channel that survives platform algorithm shifts, shutdowns, and store policy changes.