1password's pretty much the gold standard in terms of rock-solid digital security. The app act as a vault for your digital credentials—site log-ins, bank details, all that kind of stuff—all of which is protected by one long and very strong password.
Basically, it takes all the hassle out of remembering a massive bunch of strong passwords, which is kinda worth the full asking price anyway. But with 50 percent off, the apps are just $8 for iOS and $25 for OS X—which is a steal. Go get it. [1password via 9to5toys]