PCAPdroid does not collect any information.
PCAPdroid does not use a remote VPN server. All the data is processed locally on the device.
PCAPdroid processes network traffic, which may include personal data. However, such data is processed locally on the device and it’s never sent to remote servers.
In its default configuration, PCAPdroid does not perform any connection on his own. Some optional features which the user can enable, like the malware detection, may require contacting third-party servers.