I don't know, but could it be that your "pro" features aren't anything special? I mean, if a power user can be on the app for so long, and never actually need to use those features, why would they pay for it?
Power users use alarms + timers heavily according to interviews. But two of them (Level 148 and 177) have zero subscriptions (never paid), so either they found workarounds or alarms aren't as critical as I thought.
The weird part: AI Chat has 11.54% conversion rate when users discover it (vs 0.8% overall). But only 2.4% of users even find it. So there's ONE feature that works, but it's buried and most power users never see it.
Maybe the answer is: make AI chat the core experience, not a locked bonus feature?