[srn]

Female oriented apps with what, pink unicorns and fluffy bunnies?

That's a pretty silly statement no matter how you take it. Remember the myth (or the myth of the myth) about nobody needing more than 640K of ram? There will always be opportunities for novel applications, more user friendly applications, applications which take advantage of new technologies, etc.

However if you do market research or usability testing, dependent on the use case please do with both genders and perhaps different ages - for example, soft thumbboards may be perfectly fine for someone with one size hands to use and ridiculously hard to use with another. That's an obvious example, and there are other things not so obvious that may come out from that.