Eli5: How does “I Am Not A Robot” work in mobile phones?

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I know recaptcha tracks your mouse movement in computer but what about phones?

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Anonymous 0 Comments

recaptcha tracks much much more than just mouse movement, the exact things it tracks are kept secret by google, to make it harder for botters to trick recaptcha, but it’s extremely likely google just tracks every single bit of information it can claw out of your browser and then chucks all of it in a machine learning model, including cookies, browser history, if you’re logged into google it will use google account information.

And whilst on mobile it can’t track mouse movement, it can still track how fast you type, how long you click the screen, how much time there is inbetween clicks and how acurate your clicks are.