I use the Crashlytics framework for crash collecting in iOS Apps.
When you use the framework, a "Build Phase" is added to your target that runs /Fabric/Fabric.framework/run <big-hex-blob> <another-even-biger-hex-blob>
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I'd love to know that these actually do – I'm not entirely happy with having external vendors' tools monkey about with my build, I'm old school like that.