B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 157; Flight Crew Total 13900; Flight Crew Type 894
Aircraft Equipment Problem Less Severe
General None Reported / Taken
Aircraft
Both Captain and FO had gone through all of the download procedures for the new App and most current version. I had to call IT twice because my iPad was not downloading correctly. The second phone consultation with IT; the day before I started this trip; seemed successful. The first 3 days of this 4-day trip were normal for both of us. On the LAST leg of a 6-leg trip; both of our iPads simultaneously quit working. I tried to look for something in the FOM; tried opening [app]; and got nothing but gray pages. I rebooted my iPad; and then tried to retrieve [data] again after the power-up - this time; I got only an error message. I told the FO. He then tried his; and had the exact same experience. Therefore; even though we had the flight manual; we had no 737 Flight Manual; no Flight Operations Manual (FOM). All of the iPad functions other than [critical data] appeared to work normally. After reestablishing a WiFi connection on the ground; my [iPad] started working again.
B737 Captain reported his iPad malfunctioned in flight; leaving him without access to critical data.