Note this : "Quetta’s AI-powered ad-blocking technology sets a new standard in efficiency and accuracy. [...] The key to this efficiency is server-side process

Note this : "Quetta’s AI-powered ad-blocking technology sets a new standard in efficiency and accuracy. [...] The key to this efficiency is server-side processing. By handling complex computations on our servers, Quetta ensures that your device’s performance remains optimal, [...]. And in their terms : We do not do business with individuals or entities in Cuba, Iran, North Korea, Sudan, Syria, the Crimean region, DNR and LNR. If you are from such regions, you may be prohibited from using the Quetta Services. Also note that they do not explain who their employees are, which is suspicious.