Free to put on your own site. Every widget below is a small, style-isolated iframe — it always shows the current sourced figures, it never inherits or overrides styles on the page you put it on, and it links back to the full tracker.
The whole picture: the running cash and interest totals up top, then the complete category timeline underneath — hover or click any dot to open its receipt inline, right there in the widget.
The smallest version — just the two headline figures. Good for a sidebar or footer.