Be aware that the main selling point for IOS is not having to put software on target phone. But each time you access the target info, the two step authenication pops up on the target phone. You can disable this, but it takes quite a effort on new IOS's and requires change of the target password, along with a email notification to them, to do this. All very visible. So the stealthy nature of this software is out the door, without major effort and risk of discovery. I'm sure it does what it says from there, but you might as well ask the owner to hand you their phone.