Grannies Ultra Mobile isn't the name of some geriatric dance troupe. No, it's the name of a website devoted entirely to elderly ladies that you can access from portable devices. If it looks familiar it's likely because you've already been to Grannies Fucked Mobile, which is another site that has the exact same content.
Go to either site and you'll find 65 videos of grannies getting it on with men, women and multiple partners. The old babes also appear in 82 sets of pictures. None of the content is exclusive, but despite coming from multiple sources, the vids often look great and the pics tend to look good. It's been over two months since either website updated, so it's a good thing that 55 bonus sites are included with a membership. These are mobile versions of sites from the All Porn Sites Pass network, like MILFs Bang Mobile, MILFs Ultra Mobile and MILFs Wild Holiday. As far as GranniesUltraMobile is concerned, though, it's worth joining for a month or two as long as you aren't already a member of GranniesFuckedMobile.