Welcome to this week’s edition of iPhone + iPad Gems! Today’s collection of apps is another buffet of options without any particular focus, but there’s a little something for everyone inside: a great new edutainment book for kids, a cool head-tracking technology demo, an alternative web browser, a video calling app for iPad 2 users, and a good (but raunchy) book for adults. Our top pick of the week is Dano Pirate & The Numbers.…
