Installing call tracker app – The “Software” Side To Things As you may already know, you must be as undetectable as possible if you are planning on successfully spying on someone. Fortunately, there are many kinds of software available which makes this possible.An android spyware will allow you to access files from another phone without the use of any chips – whether it may be a phone book, text messages, calls, and many others. All that you need is a computer and an Internet connection – and you will be able to see all of them anytime and anywhere.