My wife sent me a couple of images shot on iPhone ended with .heic. My S7 seems not recognizing this type of things. How can open the photos on my Android?
I'd like to recommend creating a account so me or other members can assist you, as guest have limitations in replying here and if we need further Information to communicate with you.
Either use https://heictojpg.com/ to convert them to .jpg, or tell her to convert them to .jpg before sending them to you (Or she can choose "Most Compatible" in her camera app settings).
Since it's an open standard (developed my the MPEG), there's already one Android app for it - Luma.