JogPad v0.1.2

Download JogPad_<version>_universal.dmg below and drag JogPad to
Applications. Runs on Apple silicon and Intel.

On first launch, grant Accessibility access when asked. Without it
double-tapping Shift cannot read the selection in other apps.

If macOS says the app is damaged, this build went out unsigned.
Clear the quarantine flag and it will open:

xattr -dr com.apple.quarantine /Applications/JogPad.app