I'll create a comprehensive violin practice app with essential features for violin players. This will include a tuner, metronome, and scales reference, all optimized for mobile devices.

I've created a comprehensive violin practice app with three main features:

Violin Practice App Features:

1. Tuner

• Interactive buttons for all four violin strings (G, D, A, E)
• Plays the correct pitch for each string when tapped
• Shows frequency values for reference
• Color-coded strings for easy identification

2. Metronome

• Adjustable BPM from 40 to 200
• Visual beat indicator with 4/4 time signature
• Audio clicks with different tones for downbeats
• Start/pause and reset functionality

3. Scales Reference

• Common violin scales (G Major, D Major, A Major, C Major)
• Shows note names and finger positions
• Organized in an easy-to-read format
• Helpful for practice and learning

Mobile-First Design:

• Responsive layout optimized for mobile devices
• Touch-friendly buttons and controls
• Clean, intuitive interface with tabs
• Beautiful gradient background
• Accessible typography and spacing

The app uses the Web Audio API for generating tones and metronome clicks, making it a fully functional practice tool for violin players. All features work offline once loaded, making it perfect for practice sessions anywhere!