Is iPhone Captcha Necessary?

This afternoon I decided to try out the Evernote application for the iPhone. In the process of installing the application, I had to go through a registration process. As I went through the process, I got to a reCaptcha form as displayed in the screenshot below. Why on earth would an iPhone need to display a captcha form on an iPhone only registration form?

This was probably one of the most annoying steps in the registration process. Typing a captcha form on an iPhone is especially annoying. Perhaps that’s because iPhone has a less than intuitive keyboard. Whatever the reason, I’m not quite sure why an application would place this on an iPhone registration form. Have you had this happen to you?

While I think that iPhone applications have transformed the mobile industry, I don’t think that all the applications have been developed with the end user in mind. Applications should make it extremely easy to register (if necessary) via a one-click registration method. Is there some type of spam that iPhone applications are subject to that I’m unaware of? Who are these unknown iPhone spammers?

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