My Eyes Only is a handy tool, but the interface is amateurish. It often looks like a database you might create using FileMaker with large garish fields (and sometimes too-small, garish fields) for data entry that use colors that do not go together well.

It's also an open question whether it's a good idea to store all of your personal data in one place. My Eyes Only uses 512-bit RSA encryption for credit card data and identification cards, which is more than enough protection against hackers. (It uses 256-bit encryption for login data and notes.) However, the security is also directly tied to the password you use. If you just use your middle name, for example, the app becomes much less secure, even with the encryption, because someone could steal your iPhone and find the password online, giving them access to everything all in one app.

That said, My Eyes Only is a good organizational tool--and you can always decide not to include some personal info, such as your credit cards. Software Ops offers a that limits the number of entries per category to just one or two. It's otherwise comparable, but with so few entries, the free version is not too appealing.

As a back-up for your personal data, credit cards, social security numbers, and just about any other ID and membership cards you carry around, My Eyes Only is a good choice, but not a must-own. With a better interface and more customization, the app would be indispensable.