As has always been, apps must be specifically written for specific device models and major OS level combinations. An app written solely for a Z10 on 10.2.1.2141 will not work on a Q10 also running 10.2.1.2141. Consider -- one has a physical keyboard and the other a virtual keyboard...technically, they may be on the same OS release level, but the OS itself is simply not the same (can't be, given that the hardware is different).
The best place for inquiries about any app you desire for a specific platform is directly with the app developer themselves.
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Occam's Razor nearly always applies when troubleshooting technology issues!
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