In the last few days I've been vibe coding an outliner app based on this idea I had a few weeks back.
I built the Mac app with Electron and the iOS app with React Native. I'm syncing the data with Yjs. It's a simple app so a lot of the code can be shared.
What building this app has affirmed to me is that we now live in a world where vibe coding for individual purposes is freaking awesome. Again the app is simple but I can build something with relative ease with the exact features that I want.