Help App to prompt before all reboots (other than kernel crashes)?

[Android Question]

I'm getting reboots every few days and it doesn't appear that last_kmsg is begin set (Galaxy s3 4.4.2). So I'm assuming that something is intentionally rebooting it. However, there doesn't seem to be anything in the logs that indicates who's doing it, though I can the boot itself in the log.

So, I'm wondering if there's an app I can install that will a prompt to appear before any reboot (other than a kernel crash which obviously would not be trappable).