WalkBy

WalkBy is an interesting app that works a lot like Streetpass on Nintendo 3DS. In this case, you can create and share drawings and notes with other users who also have the app installed and you come across in real life.

The interface in WalkBy is pretty simple and you just have to start out by adding friends to the app. To do this, you can send invitations manually or by automatically searching for people who are found close to your location. In fact, the app uses the Bluetooth connection to connect to other users and exchange notes.

Using WalkBy with friends filters activated will help prevent you from receiving inappropriate content. Once you create any drawing or note using the editor, you just have to get close to another smartphone that has the app installed to start exchanging notes in a matter of seconds.

WalkBy lets you propose challenges to other users who are walking near you who have the app installed. Exchange all the notes and drawings you create from the app and wait for other people to reply with their own unique responses.