Of course! The only reason I think getting that aspect ratio is important is that we're used to seeing iPhones and iPads being a certain size, and when you see other ones, they look...different. This will help people identify with your logo, subconsciously going "HEY I KNOW THAT SHAPE."

As far as uniqueness, I'd take a step back away from the computer, and start thinking about what identifies your brand, and makes it special. Sounds silly, but a lot of app companies like this go with a blue/grey theme, so you're going to want something that sticks out, which means getting some concept in there. Sketch, sketch, sketch, sketch. Work icons of devices into the letterforms, work symbols associated with your trade, anything that identifies your company and what you're trying to convey into that logo.

Thinking back now, I can't actually remember what your company's name is. This is your main goal—make people REMEMBER that name, by doing something clever that makes it stick in people's heads. A professor in college I had said it was about giving them just enough information that they could bridge the gap, and realize what you're doing—that makes people remember it.

Let me see what you come up with, I'm happy to keep helping!