Assumes that you have XCode and pod installed.

git clone https://github.com/mongodb-appeng/DrawPad.git
cd DrawPad
pod install
open DrawPad.xcworkspace

Connect iPad to Mac by cable and give any requested permissions

Select the iPad from the drop-down in the Xcode top bar.

Build in Xcode, which will also install it on the ipad with command-r

Note, designed to work with Apple iPad 10.2 inch Series 7.