You should assume any (phone or windows store or mac store) app you install can and likely will be uploading all personal data that it can to their "mothership"

You should assume any (phone or windows store or mac store) app you install can and likely will be uploading all personal data that it can to their "mothership" in the name of wishing to keep track of Usage and "improve" future products. There are no laws preventing the selling of information to marketing agencies.