Why it exists
Most bill and budgeting apps ask for a lot up front, an account, a linked bank, permission to categorize every transaction, in exchange for a reminder that could have been a simple local notification. Due starts from the other direction: what's the smallest app that reliably solves "remind me before this is due," with nothing extra attached to it.
How it's built
Due is a native iOS app. Every bill you add, the name, amount, due date, and how often it repeats, is stored directly on your device. When a bill is recurring, paying it rolls the due date forward to the next cycle automatically, correctly handling short months so a bill due on the 31st doesn't quietly drift to the wrong date over time. Reminders are scheduled as local notifications, and you can mark a bill paid straight from the notification without opening the app.
What it isn't
- It isn't a budgeting app. It doesn't categorize spending or track net worth.
- It doesn't connect to your bank or any financial institution.
- It doesn't have an account system, because there's nothing to sync.
- It doesn't collect analytics on how you use it.
Supporting development
Due is free to use. If it's useful to you, there's an optional tip inside the app a one-time purchase through Apple's App Store, entirely separate from your bill data. It changes nothing about how the app works either way.