The iOS app is the single worst piece of shit app I have ever used. Take a look at VictorOps.
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.
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.
Your comment as it stands isn't particularly useful. Specifics would improve it greatly.