HOLY COW :D

I feel terrible for giving this such a bad rating earlier it rocks!!

it is 100% comparable with vanilla ms basic (so you can run all your old games on it :D)
and has file I/o and sharing
things it needs:
audio loading and saving (so you can share files over the phone and with CDs/tapes)
copy and past (so you can copy programs from safari,notes etc and so you can hand data to your program)

and most importantly
a command reference and memory map (maybe a help command that pops up a uialert with a uiwebview in it)

its really the best interpreter out there (most arent free) and this one should cost at least like 5.00$ (but could easily get away with ~7.00$)

unix_user_1 about Hand BASIC - CBM Flavor