Let’s say you use 1Password (or another third-party password manager) on an iPhone or iPad. When that’s the case, it’s easy to end up in a situation where your device will present passwords from both 1Password and iCloud Keychain, possibly along with another app. That won’t break anything, but as you can see in the screenshot below, dueling password managers can be confusing, particularly if one doesn’t have up-to-date passwords. To make logging in easier, go to Settings > Passwords > Password Options and select just one app in Allow Filling From. For instance, if you’re using 1Password, turn off iCloud Passwords & Keychain and all the other apps.
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