Giving away a free, helpful product CAN be an awesome way to build your brand while offering a public service. (But it’s brilliant, only if it works as promised. From reading the Google Play Store reviews, it sounds like Charmin had a great idea but then failed to support it.)
App description: Displays and rates public restrooms near you: Clean locations have a green “Sit” rating. Less desirable ones have a red “Squat.”