All of the data must be installed on the internal drive. One presumes that Plus takes more storage and that Pro takes even more storage. Your FAQs say that the buyer is just shafted if your software will not fit on their device, but I cannot find anywhere that tells me how much internal storage must be available in order to run your software without first deleting all other software (and maybe not even then). Data footprint for each version should be part of the standard spec listed right along with Android flavor required.
How much storage does SkySafari 6 Pro for Android take?
As an aside, waiting until the end of the online "Submit a Request" form to tell people that you do not accept requests for SkySafari is very insulting.
