Terms of Service
A free, personal project
Rosina began as a companion for personal violin practice and is shared in case you find it useful too. It does not require an account or a subscription.
It is free to use. Any contribution through the support link is voluntary and handled by an external service.
A practice companion
Scores, the tuner and exercises are guides and do not replace lessons with a teacher. Tune your instrument carefully and ask for help if you are unsure.
There may be errors, changes or interruptions. The app’s continuous availability and the accuracy of its measurements are not guaranteed.
Your data and scores
Keep a backup of anything you want to save. Clearing your browser’s data can delete local progress; optional sync can also fail.
Only import scores you have the right to use and respect their licenses. Repertoire credits and software licenses are listed in Credits and licenses.
For questions about privacy or using Rosina, write to: victoraul3@gmail.com
Last updated: October 20, 2026.