Yes, the recently released Star Traders 4x https://itunes.apple.com/us/app/star-traders-4x-empires/id872458628?mt=8 Also, Distant Star https://itunes.apple.com/us/app/distant-star/id399937205?mt=8
Star traders is only free partially. You have to buy the IAP to unlock it completely if I'm correct. And distant star is $4...