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It doesn't work. It asks you to login with Google. You login, but it redirects you to Google.com. Then you try using it, it asks you to login again...
Doesn't work; gives various errors - "can only summarise web pages linked to the internet' - when page is linked - [after selecting the text on the page] - "something went wrong' or words to that effect. In sum - in return for my email address I got no useable output. To be fair it's free and they do say they are still ironing out bugs