The title seems an odd choice, since Siri, Google Now (and apparently also Cortana, in Windows 10) can be male or female. The fact that there's some app out there that doesn't have both male and female voices isn't a valid indictment of the larger class of voice-controlled assistants.<p>I'm sure these app devs they wish they had both male and female voices, but having more than one voice is likely very expensive and time-consuming to add. So they're building core functionality, proving market demand, and then at some point (like Apple, Google, and Microsoft), they'll add multiple voices.