I built Perks Reminder, a free open-source app for tracking credit card benefits, recurring credits, welcome bonus deadlines, annual fee ROI, and loyalty expirations.
The product problem is simple: recurring benefits are calendar problems.
A monthly dining credit, an annual hotel credit, a signup bonus deadline, and a points expiration date all need different reminder behavior. They are not hard to track individually, but they become annoying once you have enough of them.
Live app:
https://www.perks-reminder.com






