If I purchased Learn Quran Tajwid Pro+/Pro version in one platform, can I use it on other platform?

You can not use the app purchased on Android on iOS devices and vice versa.

Because of the purchase systems on both Android and iOS, our Pro+ or Pro Version is only available for one type of operating system in which you purchased it. So that, if you bought Learn Quran Tajwid Pro+/Pro Version in Android, you can only use your purchased Pro+/Pro Version in Android, not on iOS devices (the same consequence also applies if you bought it in iOS).