KeyStaff vs PolySkill

Level up your note-reading chops with quickfire drills, instant feedback, and a built-in metronome that grooves with every time signature. Practice on letters or piano keys, track your streaks, and learn the theory behind every clef in one spot.

PolySkill turns whatever you're curious about into a short course made just for you. Tell Pol, your tutor, what you want to learn. Answer a few quick questions about your goal and what you already know, and your course is ready in about 20 seconds. • Start from a topic, a web page, a PDF or an arXiv paper • Every lesson explains first, then checks what stuck • Practice with real scenarios, spot-the-mistake, speed rounds, and by explaining ideas back to Pol • Ask Pol anything about the lesson you're on • Streaks, XP and daily reminders keep you going • Learn in 12 languages PolySkill is free to start: one course, its first unit and 25 questions for Pol. PolySkill Pro unlocks 25 new courses a month, every unit of every course, and many more questions for Pol. Pro is an auto-renewing subscription, billed monthly, every 3 months, every 6 months or yearly. Payment is charged to your Apple Account when you confirm the purchase. It renews automatically unless you cancel at least 24 hours before the end of the current period. Manage or cancel it anytime in your Apple Account settings. Terms of Use: https://polyskill.app/terms Privacy Policy: https://polyskill.app/privacy