I'm scratching my head over this.
I have a moderately successful app which has a free "LITE" version in addition to the full one. This is a utility app, not a game with levels, and I'm having trouble figuring out what Apple will accept for the lite version. The reason this is now an issue is that I've brought both code bases together with different targets and my new improved lite version will be iPad compatible as well.
There are two fundamental differences in the versions. In the lite version, the data displayed is only displayed for the current day, whereas the full version allows users to choose any date. Additionally, one of the data screens shows 3 data points in detail, whereas the full version shows much more. The lite version is perfectly functional in its own right and has no greyed out features.
What I would like to do is use the spare space on the lite version data screen to explain that more data is available in the full version and offer a button to upgrade, however I can't figure out if Apple will classify this as "upselling" (well how else am I going to mention the full version?) and from reading the new app store review guidelines, I was disappointed to note that absolutely no further clarity seems forthcoming from Cupertino in this regard. All the examples I find from Apple are games with additional levels and this simply doesn't match a "utility" application.
Is there any recent advice on what is and what is not allowed? I'm aware of not having greyed out functionality and nagging the user - but does having an upgrade button on one of the tabs (in the case of the iPad in a popover) count as nagging? Am I allowed to mention the additional features in the premium version or does that count as upselling? If not, what can I actually say?
Clues welcomed!