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Contact

Get in touch

Found a broken video link, want a song added to the catalog, or just have a question? Email is the fastest way to reach a real person — GuitarOS is small enough that a message doesn't disappear into a queue.

Email
mg@marcingrzanka.com

Frequently asked

Is my practice data saved anywhere but my device?
No. Everything — your streak, favorites, and history — lives in your browser's local storage only. See the Privacy Policy for details.
Can I suggest a song for the catalog?
Yes — send the song and artist by email. Songs are added as metadata plus links to an existing, real lesson video; nothing is transcribed or hosted from scratch, so turnaround depends on finding a solid existing lesson to link to.
A video won't play or a link is dead.
Tell us which lesson (the song or exercise title is enough) and we'll swap the link. Videos occasionally get taken down or made private by their creators, which is outside our control.
Do you offer paid lessons or 1-on-1 coaching?
No — GuitarOS only organizes and links to existing free lesson content. It doesn't offer instruction directly.