As I am the user of lenovo a7000. I got with in as a bloatware. As a lenovo is developer of truecaller now. first I dont k now about truecaller.
After purchace of a7000 I stated using trucaller. Many other products are. Lso available by this service like true dilar and true messeger.
All this apps are very good and very usefull. It hello m ti identify the unknown numbers. Its hell m most if the number shows a name that I dint know. Will not pickup. Once again very usefull app.