Before purchasing any spying app, make sure that:  You can access the target phone secretly and securely. Most apps will require you to download and install the mobile spy app onto the target phone.  The related spy app is compatible with the target phone’s operating system.  The target phone has an active internet connection while you download, install, and activate the spy app.  You can root the target phone. Although most apps work fine with both rooted and unrooted phones, the features that they offer could be restricted.  You have an idea of the state and local laws of your area before using a spy phone app.