Just a question about that specific concern:
The only things required for logging an approach for currency are:
(i) The location and type of each instrument approach accomplished; and
(ii) The name of the safety pilot, if required.[61.51(g)(3)]
So, assuming the issue would come up to begin with, exactly how would anyone at the FSDO know that
in your logbook was flown using an iPad? I guess the paranoia meter says that they might interrogate your safety pilot if serious questions about your currency came up in the investigation of an incident or accident, and your aircraft logs indicate your LOC radio was removed for repairs on that date but short of that unusual situation...?
Not suggesting it's ok to violate the rules (assuming there is a rule to be violated). Just wondering about the Fsdophobia.