Originally Posted by
Weston@HPTuners
If you had purchased the TrackAddict Pro app, then the App Store should let you download it onto any of your other iOS devices that use the same App Store account as you had used for your original purchase.
If instead, you previously had the free TrackAddict app and had upgraded it to Pro using the in-app purchase, then you will just need to download the Free app onto your device and use the "Restore Purchases" button on its Upgrade screen. This also requires that your device is using the same App Store account as you used for your original purchase.
In either case, the key is to use the same App Store account as your original purchase and download the same edition of the app as what you had originally started with. The App Store and sales process is all handled by Apple, so we are unfortunately not able to view or adjust any individual transactions.