With a metric that’s bound to make mobile app developers jealous, Apple has confirmed that its newly launched iOS-compatible version of iPhoto hit the 1 million user mark, only 10 days after its release. That’s not app downloads, mind you, but unique users. Given the app’s universal nature, it’s likely that many are installing it at least twice – once on the iPhone, or possibly the iPod Touch, and then again on the iPad. But Apple is counting such an installation only once in this metric. The number of actual downloads may be much higher.