Please don't take this as anything against the app, but if any admin actually relies on an app like this as the only monitoring solution for critical 24/7 servers, they should be dragged behind the woodshed and paddled. It has NOTHING to do with the app, rather the fact that mobile networks are simply not 100% viable.
That said, when there are issues (power, network etc..) with other monitoring systems, this is a FANTASTIC option. This will be part of my Android install kit forever.
I have a couple of requests:
1. A scrollable widget that shows the last result for each server/test would be cool. I will give you a full screen on my phone! ;)
2. I need to test specific services: HTTP, HTTPS, FTP, SSH. Additional service options and maybe an option to manually define ports/services would be really nice. Customers of mine that have security camera systems using a DVR often forward random ports for external access to the DVR and it would add "peace of mind" for them to be able to see that their security system is up and running.