I really liked the fact that there is one app that tells you things that might come handy later, for example, if there is traffic in one street you have to pass by to go to work, the app will tell you that you shouldn't go there because there is traffic, so you know that you have to use another street. Another example is that it can tell you whether or not you need to buy something in the market.
But there are also things that are not safe about this, for example, if someone wants to know something about you that are based in data in this app, this person might look at the app and see the info the person was looking for. It can be a bad app, as same as it tells you the right thing to do.
Something that stood out for me was that although the app author knew it could be a bad idea to make this app, he kept on in his project. He knew it could be risky but he still did it.