I may give ubreakifix a shot at a new battery in my Galaxy S7. That being said, I would never use a third-party repair service on an iPhone, since they have first-party repairs available. There is no first-party support system available for Samsung, so you're pretty much on your own. They are supposedly partnering with ubreakifix, so that's the closest thing to first party support for Samsung.
Its unfortunate that no one does removable batteries anymore, as nothing else really needs to be replaced on most phones.