Golden rule for protecting your info on internet
Do not give following permissions to any app unless absolutely sure:
1) Write over other apps
2) Access to photos, videos, files
3) Microphone
If you do the above, any one can tap your private conversations, get into your bank or know whats going in in your office and bedroom.
Even be careful with whatsapp and skype. Other than these 2 not to anyone at all. Esp the chinese apps like tik tok, share it and bigo. more