Alto

From The Apple Wiki
Alto running on an iPhone 8. From @AppleInternalsh on Twitter
Alto power off screen running on an iPhone 8. From @AppleInternalsh on Twitter
Alto Application Icon

Not much is known about Alto, also referred to as AltoMobile in the filesystem. It seems to be an audio testing application from the files on a complete build of Alto. Images 1 and 2 are from @AppleInternalsh on Twitter/X.

Contents

The contents is as follows on an iPhone 6 running Monarch 13A83262c. The application in this device is broken and missing many files, so please keep this in mind.

Folders

_CodeSignature
Images
MesaPatch

Files

AltoMobile
Alto-Mobile.plist
AltoMobile.png
com.apple.hwte.AltoMobile.plist
Entitlements.plist
Info.plist
PkgInfo