Paid apps
Specialized apps from Penko Software. Every purchase funds the free, open-source apps in Penko Plaza.
Early AccessFull release: August 2027
Penko Vox: Japanese
Learn Japanese by talking. A private, offline AI tutor with conversation scenarios across JLPT N5–N1, natural voice calls and the Kotoba Islands RPG.
Learn moreComing soon
More on the way
We're working on new apps. Follow Penko Software on Steam and GitHub to hear about them first.
Why paid apps?
Penko Plaza apps are free, open source under the GPL-3.0 licence, and will stay that way. Building and maintaining them takes time, so we fund the work by making a small number of specialized paid apps.
Our paid apps are closed source and sold through stores like Steam. They follow the same values: they run on your own device, work offline, and don't collect your personal data.
Penko Plaza