If the app store doesn't have ballistic apps then you may be able to install Google Play Store, which does. I read a review on the HD8 and reviewer said it could be done.
I ran the free version of Strelok for a couple of years, moved over to the Pro version ($12) and used that till my phone crapped out. The designer/writer said all I had to do is log back in to the Google account I used to download it originally and I wouldn't have to re-pay for it but that's ain't working.
I feel like it will work for you so good luck.