Quite frankly, the idea of using a smartphone/iPhone for some datalogging is sensible - until you start having to pay a lot of money for addons, probes etc.
Otherwise it's an entirely daft idea - pull out a decent multimeter which is half the price of an iProduct and get the job done properly without half a million things that can impair results in the middle. Some jobs are best done with the CORRECT tools.
As for worrying about iWhores and moronic gits like Jobs passing - don't, and please don't insult people's intelligence by assuming any form of offence. Jobs may have had his good side but like Apple, on the whole there is a lot of wrongdoing. Therefore Apple and iTakethePiss names are all fair game. After all, they've been taking the piss out of us for years...