I started building this for my dad to help track stock for his small manufacturing business, including reorder levels and answering "can I make x of this?". It's grown to include bill of materials, stock takes, purchase orders, and production orders, and aims to compete with spreadsheets rather than existing tools.
It's a local desktop app (Electron and SQLite), so there are no ongoing subscriptions or data sovereignty concerns, though you do pay the Electron RAM tax.
There's a 30-day trial with no feature restrictions at https://kitted.site.
I'd be delighted to answer any questions and take any feedback.