I don‘t share the experience of the previous reviewees. For now I am really satisfied with the App. Two months ago Wope published iOS apps, and they work like a charm.
I have bought and tested several SEO apps, and this is the one I turn to when optimizing my pages.
Admittedly, they don‘t communicate a lot, e.g. when updates or new features come out. That might be a mistake. I didn‘t need the support yet, so I can‘t say anything in regard to that, but I am pretty satisfied with their development! :)