Ryan from the PagerDuty support team here. Have you tried any of the newer versions? They're greatly improved. If you can pass any feedback along to support@pagerduty.com it would be much appreciated.
The number one thing this app should do is show me correct information. Don't ever show me cached version of the page from 30 seconds ago while you load. The only indication that I'm looking at a stale page is the teeny tiny loading bar at the top. I would rather see a blank loading page than the wrong information.
Oh and once the loading bar finishes, the list of alerts changes right out from under me and I often end up tapping on the wrong one. It makes me want to throw my phone.
We tried switching to VictorOps and in the first hour their website started crashing our browser.
It turned out each event was rendering in its own frame, and when we had more than a couple hundred alerts, the browser took more memory than available.
Supposedly its fixed now, but I'm not interested in being a beta tester for an alert system.
I've been using OpsGenie, which also offers incoming support phone numbers, and push notifications since day one. They did improve their Android app, but it seems that VictorOps one-ups both PD and OG.