Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 159; Flight Crew Total 3788; Flight Crew Type 1347
Distraction; Human-Machine Interface; Troubleshooting
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Aircraft; Chart Or Publication; Company Policy; Software and Automation
While enroute ZZZ-ZZZ1 our center hydraulic quantity started decreasing. While reviewing the appropriate non-normal checklists in [App]; the application crashed twice. We had to close and restart it each time; which resulted in a loss of all open tabs. Essentially we had to start the checklists over from the beginning.This happens frequently (like once or twice per trip). [App] just freezes sometimes -- it doesn't matter whether you're connected to the internet or not.Flight Operations wants to remove paper QRH's from the airplanes. This absolutely cannot be allowed to happen until we have a replacement system that works 100% of the time.
B757 Captain reported the center hydraulic quantity began decreasing while enroute.  Captain stated the app used to troubleshoot the issue kept crashing.