Hi Product Hunt, I'm Masaki, an independent developer and a violin parent.
The problem. My child learns the violin. At home, I can't tell when a note is slightly off. I'd say "that sounded fine", and then at the lesson the teacher would point at the same spots every week. My child didn't know what to fix either, so we repeated the same mistakes. I wanted a teacher's ear at home.
What Stringino does. You play from the score. The phone's microphone listens, and every note on the sheet music is colored: green if right, blue if a little flat, red if a little sharp, purple if you played a different note. After playing you get a short list of spots to fix (not a score or a grade), and you can loop just those bars. A progress graph per piece shows if it's getting better.
Things I cared about.
Audio is analyzed entirely on the device. Nothing is recorded or uploaded. No account, no ads, no tracking. It's for kids, so this was a starting point, not an afterthought.
It's a practice helper between lessons, not a replacement for a teacher. It can't see posture or bowing.
The basics are free. Only scan import (turn a paper score from a photo or PDF into an editable one) is Pro, a monthly subscription, because it runs on a server and costs real money per page.
Honest limits. It covers the violin range from the open G string (G3) upward, so viola and cello low notes aren't judged yet. It's iPhone/iPad only. Fast passages and noisy rooms can confuse pitch detection. Scan results aren't perfect, so there's a side-by-side review screen where unsure notes get a colored band.
What I'd love feedback on. Which parts of the first five minutes were confusing? Would you want viola/cello? What would make you trust (or distrust) the colors?
Built on weekends with Swift/SwiftUI and AI-assisted development. Happy to answer anything.
Hi Product Hunt, I'm Masaki, an independent developer and a violin parent.
The problem. My child learns the violin. At home, I can't tell when a note is slightly off. I'd say "that sounded fine", and then at the lesson the teacher would point at the same spots every week. My child didn't know what to fix either, so we repeated the same mistakes. I wanted a teacher's ear at home.
What Stringino does. You play from the score. The phone's microphone listens, and every note on the sheet music is colored: green if right, blue if a little flat, red if a little sharp, purple if you played a different note. After playing you get a short list of spots to fix (not a score or a grade), and you can loop just those bars. A progress graph per piece shows if it's getting better.
Things I cared about.
Audio is analyzed entirely on the device. Nothing is recorded or uploaded. No account, no ads, no tracking. It's for kids, so this was a starting point, not an afterthought.
It's a practice helper between lessons, not a replacement for a teacher. It can't see posture or bowing.
The basics are free. Only scan import (turn a paper score from a photo or PDF into an editable one) is Pro, a monthly subscription, because it runs on a server and costs real money per page.
Honest limits. It covers the violin range from the open G string (G3) upward, so viola and cello low notes aren't judged yet. It's iPhone/iPad only. Fast passages and noisy rooms can confuse pitch detection. Scan results aren't perfect, so there's a side-by-side review screen where unsure notes get a colored band.
What I'd love feedback on. Which parts of the first five minutes were confusing? Would you want viola/cello? What would make you trust (or distrust) the colors?
Built on weekends with Swift/SwiftUI and AI-assisted development. Happy to answer anything.