A detailed privacy analysis of TikTok's app and website found multiple law infringements, trust, transparency, and data protection breaches. The analysis used mitmproxy to re-route all app traffic and found that device information, usage time, and watched videos are being sent to Appsflyer and Facebook. The transfers to these companies are conflicting with the GDPR, and the data transfer to Appsflyer lacks transparency. The analysis also found that TikTok is using device fingerprinting and audio fingerprinting to identify visitors.