Corollary: how many developers of public transportation apps use public transportation, and how many of them use low-end public transportation where the environ

Corollary: how many developers of public transportation apps use public transportation, and how many of them use low-end public transportation where the environment and process may be totally different? I see from the screenshots many examples of the app giving transit instructions for what is perceived to be optimal usage, but if I were say in a bad area of Chicago would that be advice I should follow? Furthermore if children or minors were making use of this app would they be receiving the right information? I'm not trying to bash the app, it's cool, but it has me thinking..