SMSNotify is a pretty sweet new app that makes your iPhone vibrate every 15 seconds when you have an unread text message.

This app does not have an icon and is not added to your SpringBoard when you download it…it is just a code app. I think this is a great idea since I tend to miss the one time that the iPhone does notify me that I have a text message. The only issue I have found is that it does not work when your phone goes into auto-lock mode…

however, if you have your iPhone set to check your email every 15 minutes (or whatever you have it set for) it will vibrate when your iPhone “wakes up” to do it’s checking! What would be really cool is if you could also have it make the “new text message” sound too and if it would do it when you have a unchecked voicemail! This app is available in the Installer.app through the Ste Packaging source. Here is the screenshot: