I’d just use mobile. Tablet devices are not phones. In the case of the QR feature I would use both my phone and iPad to check how the site looks on both.
But would you be taking photos with your iPad, then moving them to jAlbum? That being said, I do know people who take photos with their iPads (especially Minis).
I guess I'd vote for
mobile, since it covers the waterfront. But
phone would be fine, too - tablet users will quickly understand that it includes them, especially since a lot of tablets do have cell capability, and are used as phones, as well. It's a toss-up.
The term "mobile phone" is
almost redundant these days. My sister has a land line, and a wall phone in her kitchen. The grandchildren have no idea what it is, or how one would use it.