[iphone] iPhone app could not be installed at this time

Most common issues that cause this are (from testflight's website):

  • Device storage is full
  • The provisioning profile is a developer provisioning profile
  • The ad hoc distribution provisioning profile is corrupted and the device is having an issue with it.
  • The device was restored from a backup and is causing a conflict for over-the-air distribution
  • There was a network timeout
  • Architecture settings of the build and the device are incompatible ( can sometimes happen -when "Build Active Architecture Only" is on when building).
  • Not Using Mobile Safari.

for me it turned out that my client's ipad was running iOS 4.2.2 and my project supports 5.0+.