Soldered, wired, and coded

The Bank Account Checker

A privacy-friendly rule engine that watches my bank and credit card transactions, without ever handing my data to a third party.

Many people have several bank accounts and credit cards, sometimes spread across multiple banks. But how often do you actually check every single entry? It is easy to overlook a double debit, a missing deposit, or a transaction that never happened at all.

I had exactly that concern and went looking for a flexible solution that would not require sharing my banking data with a third-party service.

Today, I get a notification for every new transaction that does not match a predefined rule, for example the monthly rent, which is checked against its usual, expected pattern. Trust is a good thing, but control is always better.

What it does

Monitors transactions across multiple bank accounts and credit cards

Rule-based matching, e.g. recurring payments like rent

Notifies me only for transactions that break the pattern

No banking data shared with third-party services

Under the hood

  • Custom rule engine
  • Bank transaction access
  • Self-hosted automation
  • Notifications