Earlier today I downloaded the Warframe mobile app. I selected "full" download for 10 GB (I checked first and had about 59 GB free), then plugged my phone into the wall and took a nap because it seemed like it was going to take a while. I woke up to my alarm about 1 hour later, and switched apps to turn the alarm off. I then swapped back to the app and right after that my phone screen went black and then showed only the apple logo while being totally unresponsive. I connected it to my PC and tried to do "update and restore" through iTunes but it failed, so my only option was a full factory reset wiping out all my data (luckily I had a somewhat recent backup so I didn't lose that much). I have had the phone for over a year and never had a full phone crash like that, and wasn't updating or doing anything with any other apps at the time so it seems like it must have been the Warframe mobile app. Unfortunately since it had to factory reset and then restore a backup from before I installed the Warframe app, there are presumably no log files on my phone to point to exactly what went wrong.