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A world-class free antivirus and mobile security solution for Android phones. The BEST antivirus protection - No.1 antivirus engine inside Hi Security is powered by McAfee - the best antivirus engine in the world - protecting your phone from any of extortion virus, malware, adware or trojans. We have official partnership with McAfee that is a part of Intel Security, so Hi Security is able to offer the best antivirus protection service globally. Applock - privacy protection With Hi Security, you can add an extra password protection to sensitive apps, such as, Facebook, Message, WhatsApp, Tinder, Snapchat, Gallery and Video. This password is different from your phones unlock password, therefore you can safely lend out your phone. Protecting your privacy with PIN, pattern or fingerprint. Junk clean phone memory releases Intelligently analysis and remove junk files to free up more space and improve the performance of your device, such as residual files, cache temp files. Clean junk to create a faster, lighter and smoother user experience. Now you can take more pictures and install apps. WiFi security - Wi-Fi examination, Wi-Fi optimisation and WiFi booster Hi Security protects your online security to avoid insecure public WiFi or phishing hotspot by detecting DNS hijacking, ARP spoofing and SSL hijacking. Boost WiFi and enhance WiFi signal strength for faster Internet speed. Intelligently manage your WiFi. No more WiFi safety concerns. User friendly, super-fast, energy-efficient and tiny Hi Security only takes less 10 sec to examine your entire phone with one tap. Power saving and less memory consumption. Small but super-efficient. Get Hi Security right now!