The Williams Piano app reveals the hidden effects and capabilities of your Legato III or Allegro III digital piano. Tailor effects like reverb, chorus, and tremolo for variations on the factory sounds. Split and layer the keyboard to create a full-sounding arrangement. The app also provides easy tuning and transposition access.

In addition, the Williams app plays a variety of drum and metronome patterns to help when practicing or songwriting. There's even a playlist of songs to jam along with, a MIDI recorder, and much more. Unlock the complete feature set of your Williams digital piano with our free app.

Note: MIDI recording feature requires Apple USB adapter.

What’s New

Version 1.2.1

Fixes some bugs we found when switching from Play Along to Jam Session.
Addressed some crashes found in the wild.

Ratings and Reviews

2.6 out of 5
11 Ratings

11 Ratings

mdictyd ,

Won’t let me play music in my library

Tried several different ways and it simply will not recognize songs I’ve downloaded to my device. This was part of the reason I bought the legato iii. Sad.

jerjuan0733 ,

Can not play along

The play along feature does not work at all. Not sure what I am doing wrong but I downloaded music over and over again but still will not show in the Williams piano app. Help?

Pic💛 ,

Not recording

I tried to record midi tracks from the app, the Bluetooth paired successfully, my cable works perfectly well on any other recording app except of its own app. the recording option is blocked to use, I read the user manual 3 times thoroughly couldn’t find any explanation about the app, and the help button at the app doesn’t really have any functionality, it is just repeating what already there.
There’s no troubleshooting options online or any information about it.
I am very frustrated.

Developer Response ,

We’re sorry you’re having problems with the MIDI recorder, we have not been able to duplicate this issue. Please contact our support department at and we will work with you to resolve this.


Guitar Center, Inc.
205.2 MB

Requires iOS 11.4 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

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