How to run iOS app on device without attaching device to Mac? My client has an iPhone and iPad at his place and wants to check the app being created by us at our place.

We are able to check the iOS app on our registered iPhone by attaching it to our Mac and running Xcode with the proper certificate.

The client has provided the details for their device (the UDID and other details). Now my issue is that how can the client run the app on their devices?
My team uses Test Flight for managing and deploying beta iOS applications. It's easy for both the developer and the tester to use, as it does all the provisioning and distribution for you. It also happens to be free to use.