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Open QuarterMaster vs Inventory: catalog facts
Open QuarterMaster	Inventory
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0.
Web, Self-hosted	Android
Modular design with a core API and optional plugins Aimed at home use as well as business-scale inventory	Imports parts by scanning supplier QR codes Fetches images, datasheets and quantities from suppliers
Still in active development, so features are changing Smaller project with a modest community	Android only Focused narrowly on electronic components
Self-hosted	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.