Our team recently switched from old-style Testflight to the new iOS8 Apple Testflight. Unfortunately, when we made the switch we didn't realize that beta testers had to be on iOS8 to install betas.
Unfortunately, we have many users stuck on iOS6 because they are using older 4th-generation iPod Touch devices. So we need a beta testing solution for those users, especially since it's older devices where we're most concerned about performance issues as we add features in our new version.
We are considering using HockeyApp for a few iOS6 & iOS7 users to flesh out our beta test matrix. I don't think we'll want to drop Testflight because it seems to have an easier workflow for getting new users into testing-- we'll probably use HockeyApp for a few testers only.
What problems (if any) should we expect from using both beta services for the same app?
Have you tried this combo, and if so what was your experience?