I've built an app for a client and we are currently using TestFlight to Beta test it. Once we finalize the build, I'd like them to have a permanent copy of the app on all their devices. How can I do this?
I've looked into creating an .ipa for "Ad hoc deployment" but this is only valid for up to a year, I believe, so not an ideal solution. This answer discusses Enterprise deployment, and the solution sounds great, but it also appears to use a provisioning profile, so that may mean a time limit as well.