RandomReminders — an iOS reminder app that fires at random times

RandomReminders is a solo-built iOS app for people whose fixed-time reminders have stopped working on them — you pick a window and how many times a day, and the app scatters the fires randomly inside it. I set the product rules and Claude Code wrote the implementation: it splits the day into equal segments and places each fire inside the middle 30% of its segment, which keeps the timing unpredictable without letting two fires land back to back. It schedules four days of alarms and two days of notifications ahead, regenerating in a background refresh whenever fewer than two days remain, and derives each system alarm's ID from a SHA256 of the reminder ID plus index so a reschedule reuses the same slot instead of duplicating it. I made the calls that shaped the business: cutting the free tier down to a single active reminder, making the silent-and-focus-bypassing alarm mode Pro-only, and rebuilding the onboarding flow twice before it landed. Claude Code also caught a subscription bug where checking for a specific entitlement name meant a typo in the store dashboard would silently swallow every purchase, and replaced it with a check for any active entitlement.