Hide Photos: Calculator Lock is a utility application for Android devices developed by NSolApps. This app functions as a regular calculator while providing a secret storage space to safeguard personal photos, videos, MP3 audios, and text documents with a PIN lock. Users can ensure the security of their important data on their phones using the calculator vault feature. Key features include creating a PIN lock for initial use, quickly hiding photos and videos, hiding PDF and text documents, hiding MP3 audio files, customizing the lock calculator with multiple themes, and resetting the password if forgotten.

Hide Photos: Calculator Lock also features a Photo Locker and Video Locker, allowing users to hide pictures and videos from their gallery for privacy. The app enables users to store personal photos in a picture vault, securely keep important documents, PIN protect all files, hide pictures, hide videos, and unhide files when needed. With options for password recovery such as fingerprint lock, security questions, and pattern lock, this app provides a secure solution for safeguarding personal data behind a regular calculator interface.