Open the Truecaller app
Tap the profile icon or menu
Go to Settings
Select the Privacy Center or Account section
Tap Delete Account or Deactivate Account
Confirm the action
Uninstall the app if needed
On Android, you can also go to Settings > Apps > Truecaller > Force Stop, then clear data if you want to sign out locally
On iPhone, delete the app to remove it from the device
If you want to stop using Truecaller completely, remove your phone number from the account before deleting it