security isn't the only problem. banks do not want the users to be fully informed. if you overdraw your account, they make more money. personally, i'd love to

security isn't the only problem. banks do not want the users to be fully informed. if you overdraw your account, they make more money. personally, i'd love to write my own open source clients you can verify and compile yourself that provide better information and heuristics - but that'd hurt the banks. there are several kinds of of users: those who make the bank money (the uninformed that do not care much) and those who are actually interested in their statements. the latter are loss leaders. for consumer banks, the latter seem to be in the majority. an app that informs you with the best intention (warning: if you continue your spending for the rest of the month like you did this week, you'll pay a lot extra!) would shift the balance even more.