Apple announced recently that it has pulled hundreds of apps from its App Store because they violated the App Store’s review process by collecting unapproved kinds of data. A third-party analytics service called SourceDNA discovered that apps from a Chinese advertising platform called Youmi were collecting personally identifiable data, including email addresses, Apple IDs, device and peripheral serial numbers, and a list of apps installed on the device. Perhaps more disturbing than the data privacy breach is the fact that Youmi was able to get the data collection past Apple’s notoriously rigorous app review process.