Want to know a quick road to a bad user app review? Local notification spam. Frankly, we're sick of it. You spam us, we'll toss your app off our phones like *snap* that.
Just because local notifications don't require opt-in doesn't mean that developers should abuse them for marketing. Here's a rule of thumb: if your notification doesn't deliver information that your user specifically requested, don't send it.
This goes for push notifications as well. When users opt in, they're not opting in for spam. One of my fellow TUAW bloggers mentions, "Ambiance is probably one of the worst, even worse than Disney. Every few days it tells you that 10 new
