[swGooF]

If your app targets tech people, then the .com may not be necessary. However, if your app targets a general audience then a .com should be used.

Here is a good test. Find a non-tech person (someone that does not know about your website), and ask him/her to go to your website. Sit him/her in front of a computer, and say, "Please go to secq.me" See if he/she can get to your website without any further directions. Here are some questions you will likely get: "Is there a .com?" "How do you spell that?" If you try this on a few people and nobody has troubles, then great.

[GFischer]

An interesting point I've observed (and I think it's been validated) is that, for some segments, Google is their domain search... if you tell them, "go to xyz.com", they type xyz.com on Google !

[swGooF]

That is a good point. I think I have seen that before too. Depending upon your website SEO, that may or may not help.