Narrative:

My first officer mentioned something along the lines that he had some issues with his efb and was downloading an app again. Since I had checked and prepared my efb the night before; I thought 'that is strange'; but assumed it was an issue with 'his' efb. Upon arrival at the airport we received a note stating that there had been some issues with the jeppfd-pro update.I went into my duties checking the logbook; briefings; etc. Now; when I finally made it to my seat on the flight deck; I found out I had also been affected. My first officer offered his efb to be used by both of us. We flew into ZZZ; had an aircraft swap; and even the operations manager came up and offered that (based on some document he received) a 'hard reboot' may help. I tried it but it did not work. We took off and after reaching cruise flight I realized that I had incorrectly recalled information; i.e. I was in error thinking a 'loaner' was only required during dual efb failure. Since we were (for all practical purposes) single efb I bought a subscription to company wifi and by the time we landed my efb was 'up to speed.'even though I was 'unequivocally sure' of my thinking; it doesn't hurt; during 'rare' occurrences/events to 'double check' my thinking with our manuals.

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Original NASA ASRS Text

Title: B737-700 Captain reported operating several legs with only one operable iPad which was contrary to company procedures.

Narrative: My FO mentioned something along the lines that he had some issues with his EFB and was downloading an App again. Since I had checked and prepared my EFB the night before; I thought 'that is strange'; but assumed it was an issue with 'his' EFB. Upon arrival at the airport we received a note stating that there had been some issues with the JeppFD-Pro update.I went into my duties checking the logbook; briefings; etc. Now; when I finally made it to my seat on the flight deck; I found out I had also been affected. My FO offered his EFB to be used by both of us. We flew into ZZZ; had an aircraft swap; and even the Operations Manager came up and offered that (based on some document he received) a 'hard reboot' may help. I tried it but it did not work. We took off and after reaching cruise flight I realized that I had incorrectly recalled information; i.e. I was in error thinking a 'loaner' was only required during dual EFB failure. Since we were (for all practical purposes) single EFB I bought a subscription to Company WiFi and by the time we landed my EFB was 'Up to Speed.'Even though I was 'unequivocally sure' of my thinking; it doesn't hurt; during 'rare' occurrences/events to 'double check' my thinking with our manuals.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.