First of all, it must be clear that these android spy apps should be used for Legal purposes only. There could be hundred of reasons why one wants to keep an eye on someone’s phone. Some of the curious personals may include concerned Parents, Teachers or even spouses. The listed are some of the best free spy apps for android. of course you can buy the premium version if you like the app but it’s free to explore and use. No root required, easy to install, undetectable and hidden (no trace that it’s there), user friendly interface and whatnot. Here are some of the best free spy apps for android.