The current process of creating flashcards with Anki involves having a few websites (Google Images, perhaps a dictionary, possibly forvo.com for audio files) open along with Anki, and dragging content from those websites onto boxes in Anki's input area. As far as we know, this not something that works on Apple tablets just yet. As for PC tablets, if you can easily switch apps and drag content from one app to another app, then that could work. We'd suspect something like a Microsoft Surface might be able to handle that, though we haven't tried it personally. If at all possible, a laptop/PC/MAC would be the way to go and then you can sync to your other supported devices, especially if you are new to Anki.
