One problem with resistor packs is whether you can read the values back. I bought a pack of resistors from a vendor, and somebody wrote the value on the tape in hand writing that is unreadable (and with a pen that wasn't quite permanent ink). I'm slightly color blind, and honestly, I cannot tell the difference between orange and brown on some resistors. As I use them, I've been using my label maker to relabel the resistor packs (and using sandwich bags when the resistors become loose). I was recently ordering some stuff from Adafruit, and I might buy their resistor book the next time I need to restock, as it seems to be better labeled: http://www.adafruit.com/products/441
As far as I know, nobody had written the Android program that uses the camera on the phone/table to identify the resistor (and capacitor presumably) value. I seem to recall there is an iphone utility that does this, but so far on the Android side, I've only seen programs that give you a chart with the color wheels.
Though if you really want to be safe, you would use your multimeter to measure each one, though I suspect most people trust the color bands on the resistors.