If you have an iPhone 5s or later, and that iPhone has a Home button, or if you have an iPad that offers Touch ID, you can set it up to work as a passcode for your iPhone or iPad and App Store purchases and for apps like 1Password or Notes. If your iPhone or iPad doesn't have a Home button, you'll want to read our article on how to set up Face ID instead. If you're not sure if your device has Touch ID, see the full list of compatible devices at the end of this article. Using Touch ID is as simple as placing your finger on your Home button, which is where Touch ID resides. Touch ID recognizes your fingerprints, up to five of them. But first you'll need to set up Touch ID and allow it to be used across your device.