Transcribes violin playing in real-time, allowing you to see your intonation and timing as you play. Play with included sheet music or freestyle. Free to download and try out. Tuning strings, record/playback, and metronome are free. Other features can be sampled before purchase.

- The only tuner that works for double stops
- Records your session so you can review your playing
- Sheet music gets marked up as you play and scored at the end
- Scales and arpeggios in all keys from 1 to 3 octaves with accelerating patterns
- Includes metronome with option to display beats and accent certain beats
- Intonation colors, sensitivity, and temperament, and reference A are configurable
- Synthesize songs and recordings to hear the correct intonation and timing
- Import your own songs from MusicXML
- Save recordings to .wav file
- Customizable displays including treble staff, pitch graph, precision intonation, and double stop interval
- Optimized for iPad and iPhone in landscape and portrait orientation.

Current subscription price is $0.99 per month and auto-renews.
– Payment will be charged to iTunes Account at confirmation of purchase
– Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
– Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
– Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase
– Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

Terms and Conditions:
Privacy Policy:

What’s New

Version 1.28

- imported songs remember their screen layout (measure per line, lines per page)
- fixed page turns when Page Lead Time slider is set to minimum (far left)
- fixed bug when importing certain MuscXML files

Ratings and Reviews

4.6 out of 5
14 Ratings

14 Ratings

Waitlossgyrl ,

My Favorite Music App!

UPDATE: Still my favorite music practice app, but now even better!!! I just discovered it has a "Space Invaders" shooter game that yses intonation as the controller to shoot notes!! Makes sight reading practice so much fun! And playing notes in tune outside of a melodic context is sharpening my ears. This app is so wonderful. I use it several times a day.

I use this app every day while I practice violin. I love it! I love the scales practice, I love the metronome, and I love getting a visual history of my intonation.

Every day I record my sections of my pieces as I practice them. Music Wrench records the audio and records a color coded visual display that tells me how in tune or out of tune each note is.

I actually turn my back to my iPad while I play with Music Wrench running. Then I stop and self evaluate. I think about which notes were flat, which were sharp. and which were in tune. After I self evaluate, I turn around and look at Music Wrench to see how accurate I was. Then I listen to the recording and watch the color coded display as I listen. This has helped my intonation so much! I never practice without it!

plant notes ,

Surprisingly effective!

This has become a go-to app for me since it gives continuous intonation feedback in the context of scales, tonality exercises, and even some musical pieces. Given it meets my needs so well and I use it every practice session it deserves 5 stars, but I sure wish it were possible to upload musicXML. Given the limited repertoire, it seems like a demo until you really start to use it. The UI is a bit odd, but you get used to it and it works.

Vlaist ,

Great for vibrato too

This is a surprisingly useful app. Professional musician and teacher.
In the practice mode you can look at width of vibrato and constancy, (yes, keeping 3 down while vibrating 4 visibly helps!) you can see accidental squeaks from bow or bow/finger timing, I suspect there are many more uses than checking intonation.

I wish it worked for the viola C string -it currently does not. It would be nice to have at least the single-line intonation feedback available for those 7 too-low notes.

App Privacy

The developer, Alden Doyle, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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