# String AI: Violin Viola Cello — AI practice coach for strings > AI practice coach for violin, viola, and cello with real-time feedback. (iPhone/iPad app by Youna Choi.) - Source: https://appshunter.io/ios/app/string-ai-violin-viola-cello/id6787829281 (this page in markdown: same URL + `.md`) - Developer: [Youna Choi](https://appshunter.io/developer/6787829283) - Category: Education, Music - Price: Free with in-app purchases - Rating: 4.30/5 from 6 App Store ratings · 6 written reviews indexed - Age rating: 4+ - Requires: iOS 15.1 · 132 MB - Languages: American English, Korean - Released: 2026-08-18 - Data updated: 2026-10-28 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/string-ai-violin-viola-cello/id6787829281/reviews.md ## What is String AI? String AI is an AI practice coach built exclusively for violin, viola, and cello. It listens note by note, watches your form, scores every attempt, and tells you what to fix as soon as you finish. The same scoring standards are applied to every attempt you play. THE STRUCTURE OF A LESSON, EVERY TIME YOU PRACTICE String AI plans your session, scores each attempt on five playing elements, diagnoses what needs work, and prescribes missions that target it. You always know what to work on next — and why. MUSIC CLASSES — EAR TRAINING, THEORY, HISTORY & VIBRATO Learn what practice alone rarely covers. Hear everything from intervals to harmony with real piano sounds and see it on the keyboard and staff, meet composers from the Renaissance to the 20th century, and develop vibrato step by step on your own instrument. Quizzes and stars show how far you've come. MY SCORES — LESSONS ON YOUR OWN PRINTED PART Bring in a printed part for your instrument from Files, your photo library, or the camera. The app reads the notes on your phone, and you fix what it misread with simple tools. Then listen, slowed down if you like, and take a lesson on measures you choose: one play-through, then missions on the weak spots. Your music stays on this device. A connected teacher sees your practice time; if you share titles, they also see the title you give it and its instrument — never the music — and can assign it as homework. For student accounts and printed single-instrument parts. BUILD GOOD PRACTICE HABITS Set a target date for any piece and String AI paces you to it — planning each day's session, tracking whether you're ahead or behind, and warning you early if the timeline isn't realistic. Spots that need work aren't glossed over: String AI isolates them into short missions just a few measures long and has you repeat exactly those spots. WHAT IT SCORES (5 PLAYING ELEMENTS) • Intonation — real-time pitch tracking, note by note • Rhythm — timing and steadiness • Tone — clarity and quality of sound • Dynamics — control of loud and soft • Posture & bowing — on-device vision analysis of your form WORKS WITH YOUR TEACHER (OPTIONAL) Your teacher sees your practice time, scores for the five playing elements, weak points, practice journal notes and mood, and assignment progress (the full list is in our Privacy Policy) — and can send back assignments, teaching notes you see on your practice plan screen (with AI coaching on, the AI guidance at lesson start uses them too), and markings written directly on your sheet music. Off by default, on only once you enter your teacher's invite code, and revocable at any time. Recordings are not shared with your teacher. YOUR RECORDINGS ARE NEVER UPLOADED TO OUR SERVERS Audio and video are processed on your device. Lesson replays are temporary. Practice Room recordings are saved on this device when you stop recording and can be deleted in the app. If you choose Save video, a copy goes to your photo library and follows your photo app's settings. Your account stores practice records and the limited data described in our Privacy Policy. No ads. No tracking across apps. PLANS Start with a 7-day free trial (same practice limits as Basic), then choose a plan by daily practice volume. Each plan includes a daily baseline and a monthly total: practice less on busy days and up to three times your baseline on free days, and unused minutes carry forward within your monthly total. • Basic — 15 min/day baseline · 450 min/month • Casual — 30 min/day baseline · 900 min/month • Standard — 45 min/day baseline · 1,350 min/month Subscriptions renew automatically; cancel anytime in your App Store subscription settings. Terms of Use (EULA): https://youna-string.github.io/stringai-legal/terms-of-service.html Privacy Policy: https://youna-string.github.io/stringai-legal/privacy-policy.html Students under 14 require a parent's consent before use, in line with children's privacy laws. ## Key features - Real-time note and form analysis - Five-axis scoring (intonation, rhythm, tone, dynamics, posture) - Instrument-specific feedback for violin, viola, cello - Personalized practice session planning - Targeted drills for weak spots - Optional teacher integration for progress sharing ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Standard | $39.99 | per month | | Basic | $13.99 | per month | | Casual | $26.99 | per month | | Pro | $59.99 | per month | ## Is String AI safe? Not enough ratings yet to assess String AI. ## Is String AI legit? String AI: Violin Viola Cello has limited verification signals. The AppsHunter Legitimacy Score for String AI is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/string-ai-violin-viola-cello/id6787829281/reviews.md ### 5/5 — great app for students *2026-10-26* i highly recommend for young students who need help for their practice! ### 5/5 — Perfect practice companion! *2026-09-10* I’ve found this app to be a great tool for daily practice. It gives my child clear direction during solo practice, making their routine much structured compared to practicing alone. It works best as supplement to regular lessons rather than standalone teacher. When used alongside regular lessons, it acts as a fantastic practice assistant. Recommended! ### 1/5 — Not Good Yet *2026-09-08* Started the 7-Day trial and it is nothing like I thought it would be. It isn’t clear about what it wants you to do. You can’t talk or message the AI to clarify or ask questions during practice. It just keeps telling you unclear instructions. It only has a tiny list of songs to choose from for cello so this is basically useless for my daughter. It also doesn’t help much with form. Maybe in the future it will improve but it’s not there yet. ### 5/5 — Such a great app! *2026-09-01* An amazing app for beginners! I just started learning the violin and needed some guidance. This app gives perfect guidelines, sets my practice schedule, and even corrects my posture. Highly recommended! ### 5/5 — 좋은 앱 *2026-08-21* 아이가 집에서 연습을 안해서 다운받아봤는데 아주 디테일해서 좋아요. 시간도 제가 정해서 할수 있고 생각보다도 더 자세하게 코칭해줘서 좋았어요. 특히 스케일 연습할때 음정을 잘 봐줘서 좋았어요. ### 5/5 — Great App! *2026-08-21* Great use of AI for my kid’s daily practice! The features are well thought out and make practice time more efficient, engaging, and productive. I especially love that my child can continue practicing and get helpful guidance even when her teacher isn’t available. It’s a great tool to supplement regular lessons, and I can already see how it can help her improve with consistent practice. We’ll definitely keep using it! Highly recommended! ## Frequently asked questions about String AI ### What instruments does String AI support? String AI is built exclusively for violin, viola, and cello. It provides instrument-specific analysis tuned to how each instrument is played. ### How does String AI score my practice? String AI scores practice across five axes: intonation, rhythm, tone, dynamics, and posture. It also provides supporting checks such as vibrato, giving you a comprehensive picture of your performance. ### Can my teacher use String AI to see my progress? Yes, String AI offers an optional teacher integration. By entering a teacher's invite code, your teacher can view your practice time, scores, and weak points, and send back assignments or notes. ### Is my audio and video data safe with String AI? String AI prioritizes user privacy. Audio and video are processed entirely on your device and are never stored or uploaded. Only your practice scores are saved to your account. ### What are the subscription plans for String AI? String AI offers several subscription plans based on daily practice volume: Basic (15 min/day), Casual (30 min/day), Standard (45 min/day), and Pro (60 min/day). Each plan includes a daily baseline and a monthly total, with unused minutes carrying forward. ### Does String AI have ads? No, String AI is ad-free. The app is designed to provide an uninterrupted practice experience without advertisements. ### How often is String AI updated? String AI was last updated on August 24, 2026, with version 1.0.1. This indicates a recent update, suggesting ongoing development and support for the application. ### What is the age rating for String AI? String AI has an age rating of 4+. This means it is considered suitable for children aged 4 and older, making it accessible for young musicians. ## Version history (last 4 releases) ### 1.0.3 — 2026-10-28 New: My Scores for student accounts. Bring in a printed part from Files, Photos or the camera, fix what the app misread, and take a lesson on measures you choose. Your music stays on this device. Also new: Ear Training, Music Theory, Music History and Vibrato classes with spoken explanations, teacher homework on a chosen measure range, and saving Practice Room videos to Photos. A linked teacher can now see your practice journal and class study time, and you can report content in the app. ### 1.0.2 — 2026-09-12 End each take with the "I'm done!" button; new dynamics missions and chord marks. Practice Room recordings up to 10 minutes, membership simplified to three plans. Voice guidance and score display fixes. ### 1.0.1 — 2026-08-24 A big reliability update, plus a new Practice Room. • Practice Room — a free-play space with a large tuner, metronome, and drone. Recordings stay on your device. • Practice journal — jot a line after each session, see it on your calendar, and delete any entry you don't want to keep. • Score markup — write on your sheet music with a pen and eraser; pinch to zoom. • Sharper AI coaching — feedback now sticks strictly to what was actually played, so you'll never see a comment about a passage you haven't tried yet. • More accurate scoring for dynamics and note timing. • Clearer progress: your calendar now shows what each mark means, and practice totals update right away. • Fixes: subscription tier is read correctly after a plan change, loading errors no longer look like "no data," and the first tap after typing now registers. ### 1.0.0 — 2026-08-18 No release notes. ## Apps similar to String AI | App | Rating | Price | Category | | --- | --- | --- | --- | | [Violin Tutor: Practice Loop](https://appshunter.io/ios/app/violin-tutor-practice-loop/id6763668046) | 1.0 (2) | Free | Education | | [피아노 레슨 카드](https://appshunter.io/ios/app/id6760224601) | — | Free | Education | | [작쌤 Jakssem](https://appshunter.io/ios/app/jakssem/id6810133254) | — | Free | Education | | [PS 230 Doris L Cohen](https://appshunter.io/ios/app/ps-230-doris-l-cohen/id6736829087) | 5.0 (1) | Free | Education | | [GlomCon Hawaii](https://appshunter.io/ios/app/glomcon-hawaii/id6791670049) | — | Free | Education | | [AMPMobile - Zap Solutions](https://appshunter.io/ios/app/ampmobile-zap-solutions/id6784681776) | 1.0 (6) | Free | Education | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-28.*