Downloadable mobile applications for protecting users' private data with PIN (Personal Identification Number) code, pattern lock, fingerprint; Downloadable mobile applications for locking photos, videos, galleries, Apps, contacts, messages by just one click; Downloadable mobile applications for hiding users' private data; Downloadable mobile applications for locking Apps to avoid accidental payment; Downloadable mobile applications for locking photos, videos and Apps by invisible pattern draw path; Downloadable mobile applications for cleaning up App cache, duplicate photos, videos, screenshots; Downloadable mobile applications for catching photos of any intruders that enter an incorrect password; Downloadable mobile applications for detecting and locking newly installed Apps; Downloadable mobile applications for customizing the re-lock time at specified times; Downloadable mobile applications for disguising one App as another App