String AI

AI feedback on how you play

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Record a practice session and get specific, measured feedback on intonation, tone, bowing, rhythm, and posture, analyzed on your device in seconds. Practice like a teacher is listening. Your first three analyses are free — no account, no card, nothing to set up. StringAI records your playing, measures what you actually did, and turns it into clear coaching — one thing to work on at a time. No vague encouragement, no guesswork: every note is measured, and every piece of advice points at something real in your recording. WHAT IT MEASURES • Intonation — how close each note lands to the pitch you meant, and how steady you hold it once you get there • Tone — brightness, stability, and the scratch, whistle, and surface-noise faults that come from bow speed, weight, and contact point • Bowing — bow angle and travel, straightness through the stroke, and how much of the bow you actually use • Rhythm — timing against the beat, note by note • Posture — bow hold and left-hand wrist angle, tracked with on-device vision HOW A SESSION WORKS 1. Record. Point your phone at yourself and play — a scale, an exercise, or a piece you're working on. Or record audio only, with no camera at all. 2. Get measured. Pitch, tone, bow motion, and posture are analyzed right on your device in seconds. 3. See what happened. Not a grade out of ten — real counts. How many notes landed in tune, which ones keep drifting and how often, and what went well. 4. Practice it. Guided practice blocks turn the diagnosis into something you can actually do, then check whether it worked. BUILT TO SHOW PROGRESS Every session counts the same things, so your trends mean something over weeks and months. Watch your out-of-tune notes fall, see which notes keep catching you out, compare attempts at the same passage, pin the piece you're working on, and set a weekly goal you can actually keep. YOUR RECORDINGS STAY ON YOUR DEVICE Practice video and audio are analyzed on your phone. Raw recordings are never uploaded to our servers. What syncs is your results and progress — not the footage. FOR WHO Adult beginners, returning players, students between lessons, and anyone practicing without a teacher in the room. Violin first — the measurement work is built on the violin's range and technique. A NOTE ON WHAT THIS IS NOT StringAI is a practice tool, not a teacher and not a medical or diagnostic product. Its measurements and AI feedback can be wrong. Treat them as a second opinion on your own ears, not a verdict. SUBSCRIPTION After your three free analyses, StringAI Pro unlocks unlimited recording and analysis, personal AI coaching after every session, and your full practice history. StringAI Pro is an auto-renewing subscription, available monthly ($9.99) or annually ($59.99). Payment is charged to your Apple ID at confirmation of purchase. It renews automatically unless canceled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the period ends. Manage or cancel in your Apple ID settings after purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://marvalarva2929.github.io/stringai-site/privacy.html

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The developer, Joshua Vigel, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Contact Info
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Joshua Vigel
Size
80.6 MB
Category
Education
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Joshua Vigel
  • Developer Website
  • Privacy Policy