Truecaller is a multipurpose call management app which is primarily used for identifying and blocking unknown incoming calls. Prima facie, it sounds like an amazing idea for us to know the real identity of an unknown caller. With truecaller app, you can identify any caller, you can just ignore him or block the number. Is't it a nice feature? However, once you know the functioning of Truecaller app, you will be stunned to know how this app is stealing our personal information and sharing with others.
Why shall you stay away from truecaller?
Crowd sourced software are not a bad thing. The main concern with Truecaller is the privacy issue. You have no idea what all personal information it collects from your phone. We wrongly assume that the app merely collects our name and phone number however, Truecaller actually copies much more than we can imagine. And, it is rightly mentioned on its website

What personal data Truecaller copies?
According to truecaller website, it collects the following personal data from your mobile phone:-
Shocked? [1]
Is there any personal data which is left out?
Why does Truecaller collect information about your gender, your device log, screen resolution and your call logs at the first place?
There is more to it. Truecaller even uploads your contacts or phone book to its server.
32.8k views · View 76 Upvoters · View Sharers Answered Sep 22 2018 · Author has
68 answers and 191k answer views Saket Saurabh, Writer at Technoaries (2017-present)
1. Your first name, last name;
2. Phone number;
3. Photo;
4. Gender;
5. Street address;
6. Zip code;
7. Country;
8. email address;
9. Professional website;
10. Facebook page;
11. Twitter address;
12. geo-location;
13. Your IP address;
14. device ID or unique identifier;
15. Device manufacturer and type;
16. Device and hardware settings;
17. SIM card usage;
18. Applications installed on your device;
19. ID for advertising;
20. Ad data,
21. Operating system;
22. Web browser;
23. Operator;
24. IMSI;
25. Connection information;
26. Screen resolution;
27. Usage statistics;
28. Default communication applications;
29. Access to device address book;
30. Device log;
31. Event information;
32. Logs;
33. Keywords and meta data of incoming and outgoing calls and messages;
34. Google ID’s and email addresses will be collected and used from Your address book.


Shocked?

Is there any personal data which is left out?
Why does Truecaller collect information about your gender, your device log, screen resolution and your call logs at the first place?

There is more to it. Truecaller even uploads your contacts or phone book to its server.

That means they are using the phone with me ooo...well,i don't even have the app on my phone sef...so what's my own...