“If we interrupt your logging flow — our app is a food tracker — if we deliver messages during that experience, that's obviously a pretty horrible user experience. We could see in the experiments that people uninstalled and they didn't upgrade. But if we hit you with that message after you're finished logging or after you've marked your day complete, those times are a lot more beneficial.”

Time in-app messages to user wins, never mid-task

Lose It! learned that delivering monetization messages mid-task (during food logging) raised uninstalls and depressed upgrades. Wait until task completion — the dopamine spike from a small win — and conversion jumps. They added a persistent countdown timer at the top of the log so users who dismiss the modal still see a path to the sale all day.