Use Wabbitemu and install the app to the emulated calc and then (somewhere but I forgot where) there is the ability to go to the beginning of where the app is stored in memory.  If it is not enabled by default there is an option to "decompile" the source from byte-codes into asm.  There won't be any comments of course but it is a start.  I have already wasted at lot of time with the app though trying to make the app think that I have bought the full version.  I actually got I to think I did too but it seems that they multiple protections in the code because the app would hang whenever I tried to do any calculus functions but would be fine with anything else.      Anyway... unless you're good at asm it is probably a waste of your time (it is almost embarrassing how much time I had wasted.)


I would have no problem paying about $30 for the app but for $100 I could get a used cx cas to do the work for me.... I bet they would actually make more money to if it were less.

the 100$ price tag is ridiculous
i'd rather buy myself a new smartphone (which will probably die in half an hour considering my luck with mobile phones )

The only issue, though, is if the smartphone is banned at tests (especially if it has wi-fi or 3G capabilities, which can be used to cheat). Still, charging this much for a calculator app is ridiculous, especially considering its main target audience is students, who rarely have close to this much money.