This is how the app looks like on my iPhone SE.
Here are the issues
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Lack of password manager integration, most apps support filling in the password from lastpass or 1password.
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The password field is hidden, I cannot see what I am entering. It is not easy to fill a long complex alphanumeric password without seeing what I am typing.
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I cannot long press on the password field to get a paste option to copy from my password manager.