Add custom info to HockeyApp crash report

I have included an iOS app with the HockeyApp platform. Everything is working correctly, but I need to add additional information like texts from NSLog for reporting failures. Maybe? I don't want to use external frameworks (NSLogger, CocoaLumberjack), databases, servers, Webapis. I want to keep all crash information in one place - HockeyApp. Has anyone had such problems and / or some kind of solution? Any help is greatly appreciated!

Thanks in advance!