An app that turns photos into calendar events is making $350/mo.
Photo2Calendar is an iOS utility that lets you snap a photo of a flyer, appointment card, work roster, or handwritten note and it creates a calendar event automatically.
$310/mo profit. One focused feature, no bloat.
The best indie apps solve one annoying problem really well.
Check it out on DealMyApp: https://dealmyapp.com/listings/photo2calendar