I have iPod classic 4G. Unable to download particle app (requires IOS 7 or higher)

Apple doesn’t seem to have app time machine for previous sparkcore app. Apple keeps changing Xcode version and IOS upgrade. Any idea where I can download classic sparkcore app that works iPhone 4g - iPod 4g?

I’m not looking for IOS sparkcore source code. I’m looking for compile app where I can import iTunes and sync on my classic iPod. Can anyone help and put on google drive, box, dropbox, cloud drive?

Case for emergency: Android, iPhone battery fails, thunder blackout, maybe engineer need one, etc.