Is Profit Bandit only for phones or can it be used on an iPad or Android tablet?

Profit Bandit will work just fine on an iPad, (other than the 1st generation iPad, which doesn't have a camera) an iPad Air or an iPad Mini.

Profit Bandit will run on most Android tablets, but your tablet must have an auto-focus camera in order to scan barcodes.

The minimum OS requirements are: iOS 9 and Android 4.0.3.