Ask HN: Custom solutions to manage your finances?

I'm a developer with ideas to implement ways to better manage personal finances. Was hoping to see what others have come up with until now.

One thing I did do, however, was create a spreadsheet that allows me to track all my Chase credit card points super nicely.

Here is the link: https://docs.google.com/spreadsheets/d/1ciivnpDHQJyC5WJWNj0UfBJY95mnWTFVpYpKk_n9Rr4/edit?usp=sharing