[Zubersoft]

I'm so sorry to hear that you encountered that. Did either Chromebook happen to install an update for MobileSheets at that time? I've heard users say that this causes a crash. If not, if you go to Settings->About, do you have "Enable Crash Reports" turned on? If so, I can try to look through the crash reports to see if I've received any from a Acer Spin 713 chromebook. Is this a crash you can reliably reproduce? 

Mike