This app was mentioned in 1 comment, with an average of 2.00 upvotes
I have the C2 also. Both will send a notification to your app. It can take up to 10 seconds sometimes, but I don't think any of them out there will do it with in a second. I normally get a notification with in 3 to 5 seconds of it detecting motion. Here is the app for Android. Says instant alerts coming soon, but it's in the app now.
https://play.google.com/store/apps/details?id=com.foscam.foscam
You can also have it record on to a SD card when it detects motion. It will keep up to 5 seconds before the motion is detected and will record up to 5 minutes after the motion is detected.