Admit it, you're terrible at memorizing passwords.
Just like the rest of the world, your passwords are too simple or reused between many sites. To hackers, your accounts are like an empty house with the door left open.
I'm sure you've tried to do better. Maybe you keep a notebook or post-it with passwords. Maybe you even store your passwords in a program or just in your browser. The problem with putting your passwords somewhere "safe" is two-fold: Somebody can steal them, and you can loose them.
Master Password is a stateless solution, which means your passwords aren't saved anywhere. Not in your head, not in a notebook, not on your computer and not in the cloud.
Nothing to store means nothing to keep safe and nothing to lose.
Master Password just recreates the passwords for your sites whenever you need them: instantly and on-demand. At the same time it makes sure that your accounts are adequately protected with secure and unique passwords.
Master Password is different from other vault-like password solutions. It helps you set secure passwords for your sites, and at the same time makes losing your passwords almost impossible. It requires iOS5.0, but a Java & CLI version exists too. A Mac version is under development.
Built on algorithms such as scrypt and HMAC-SHA256, your master password is kept safe even if websites you use get hacked.
As to prove a point, LinkedIn, eHarmony, and Last.FM have announced breaches that compromise millions of passwords in the past month alone. These breaches have leaked "hashes" of people's passwords, which make it trivial for attackers to find out the actual passwords if they're not secure enough.
Locked from prying eyes
Your master password unlocks the application and grants access all the passwords inside.
It is the only thing you will need to remember from now on.
Creates secure passwords
The application generates secure, random and unique passwords in a format that's easy for you to copy.
Different password types
Master Password's presets allow you to comply with almost any site's restrictive password policies, while still producing as secure a password for them as they permit.
Copy with a tap
It's really easy to use the password on your iPhone: Just tap the password to copy it and paste it in a different application's password field.
Goodbye, annoying App Store password pop-up.
Saves custom passwords
You can also store custom passwords in the application. They will be safely encrypted with your master password.
Not just for online
These passwords can also be used for the things around you: Your bike lock, your home alarm system, PIN codes, ...
Syncs with iCloud
Enable iCloud support to store all your password names in your iCloud account. Great for keeping multiple Apple devices in sync or backing up your site list.
Apple will never see any of your passwords.
Data liberation
And of course, you retain full control over all your passwords: You can export them at any time, and import new site lists.
What about your Mac?
A Mac version of Master Password exists too! It gives you access to all of your passwords without needing to bring up your phone.
Just enable iCloud for a seamless experience.