Is there a device that stores passwords?

I have different passwords for every website. They are all 20-30 characters and use capitals and lower case letters, numbers and special characters. I can remember a few of them but it's way too difficult to remember every single one of them.
Is there a device that stores all of my passwords and can manually enter them when I plug it into my iPhone? I currently have all of my passwords stored on an app which I open every time I need to log in, but I don't like storing them on my iPhone. I would rather have them stored on a separate device that can recognize the website I'm on and enter the password without me clicking anything.
I don't know if that's even possible but if there's such device, please let me know the name of it

I use lastpass on my computer, and this can fill in the password and username fields for you, not sure if this is the same on a phone or tablet though

You need to learn how to create passwords properly. You've got the length of the password correct, but the rest is a waste. Just string 4 words together that create something easy to remember. As long as it's 16-20 characters long, you're good. Special characters/caps etc do you little good at that length.

LastPass has a free version for storing passwords. There's also Dashlane and a few others.

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