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Android Virtual Pen vs Astropad Studio: catalog facts
Android Virtual Pen	Astropad Studio
Free Free and open source under the GPL 3.0.	Paid Commercial software from Astropad; see the site for current pricing.
Linux, Android	Windows, macOS, iOS
Built for low-latency pen input Adjustable pressure threshold and sensitivity	Uses an existing iPad and Apple Pencil as a pen display Works with Mac and PC
Host side supports Linux only Needs a pen-capable Android device	Requires an iPad and Apple Pencil Commercial software
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-only	License not stated
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 1, 2026	Official website Full listing and sources Checked October 2, 2026

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