I had a conversation with another user here who mentioned wanting to track their silver/gold buillion but not necessarily wanting to add them all to their numista catalog. This got me hyperfixated on building a simple web frontend to manage an inventory ledger. I spent about two days working on this with some help from google.
It's pretty basic but so far you can:
- Log your coins/bars/bullion with detailed info
- Track spot prices and view historical data
- Calculate total value, average price, and more
- Import/export data in HTML ,CSV, JSON, and Excel formats
- Search, sort, and paginate your inventory
All data is stored in your browsers localfiles the only requirements to be online are the libraries used for exporting to pdf/html/excel
If anyone is interested in giving it a test, or offering any feedback feel free. You can test it out here: https://www.lonniebruton.com/pmtools/

I hope this is useful to someone, if not it was still a pretty fun weekend project.
I eventually would like it to pull the spot prices automatically and I have a few other features I wouldn't mind implementing. I'm still thinking about how to make an import function that will parse the numista export files.
Thanks
-Lonnie