How To Hide Your Files? Just Long Press Equal (=) Sign To Hide Your Files. Calca‑V is a simple calculation and file‑hiding app that looks like a normal calculator but secretly protects your private data.�� You can quickly do everyday math with a clean, easy keypad while keeping photos, videos, and documents locked behind a secure PIN in a hidden vault area.�� This design helps users manage bills, homework, and daily totals without drawing attention to their private files, because anyone else sees only a regular calculator screen.�� The app is especially helpful for users who share their phone with family or friends and want a fast calculator plus quiet protection for personal media in one place.