The more correct place to pose your question would be to the actual developer. BB does not "pull" apps from developers...rather, the developers choose which BB platforms they will support, and then they "push" their app out via whatever channel they choose. If you know the app developer (likely you can find it inside the app on those other platforms), you can ask them.
Also, if you update your Z10 adequately (10.2.1.x), then you can install Android APK apps directly.
Occam's Razor nearly always applies when troubleshooting technology issues!
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