A good way to maintain a secure device is to ensure no one can access it but you. Having a passcode that you keep to yourself is a great way to keep a device private, but a device that uses Touch ID may end up with a few extra fingerprints from unknown persons. But you might not have known that you can actually test which fingerprints are yours and which fingers they belong to! Here's how to determine unknown fingerprints and delete them.

One of the best ways to use the Apple Watch is as a fitness tracker. Luckily, Apple designed the Apple Watch with fitness in mind, including various features, sensors, and metrics built-in to the device. If you're interested in strength training but are not a fan of using weights, or you would prefer to exercise in a way that's more natural to the body's movements, you'll want to learn all about Functional Strength Training on the Apple Watch.