Yes, play store restricts apps you can view based on your device id and android version for compatibility reasons, and to protect consumers from purchasing apps they can't run. Also, devices can be blocked from viewing apps in play store because the developer has chosen to restrict them or doesn't support them. Custom roms also sometimes change the device id in the build prop to one that play store doesn't understand or recognize. It's still possible to get around this though. You can either download the app from your computer and move it to your phone, or modify your build prop file with a root browser to reflect a different and compatible device and obtain the app normally. With either course of action, the app chainfire3D can be used to scale the graphical/processing demands of ultimate special fx to fit the thunderbolt's gpu. Keep in mind, I personally haven't tried to do this, it's just a suggestion to try if you're bound and determined to get the app. Hope that helps.
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