The first killer app for Apple Watch is born

1Password is a very useful password manager for computers, phones, and tablets. Now, it will also be applied to Apple Watch.

1Password's developer team AgileBits announced on Tuesday that 1Password for Apple Watch has arrived, although the first batch of Apple Watches will not be delivered to buyers for another two weeks.

AgileBits said in its blog that no matter what kind of service you need, 1Password for Apple Watch can help you. For example, when you need a password to open the garage, you can get a one-time password through 1Password. When you call to order a pizza, 1Password can help you find your credit card number, etc.

AgileBits also gives the example that you might forget the password to your gym locker, so you can store it in 1Password and easily get the password through the Apple Watch on your wrist without having to fumble for your phone.

1Password could be a critical app for the Apple Watch. People are looking for a killer app that will differentiate the Apple Watch from other Apple products. For a smartwatch, 1Password could be the ideal tool to help you find passwords across apps and services without having to rely on your phone or computer because you want faster, more secure access to data while keeping your hands free from the hassle of typing in passwords. 1Password seems particularly useful in situations where you need to remember a password and don't have a computer handy.

It's still unclear how Apple Watch owners will unlock the password manager on their wrist, but we assume it will have the same security measures as Touch ID. Once the Apple Watch is linked to your phone, it won't work if you take the watch off. We've reached out to AgileBits and will update with more details.