CalcSafe vs NullVault

CalcSafe is a mobile app that presents a private file vault behind a working calculator. Entering a secret PIN in the calculator opens the vault. The app stores photos, videos, documents, audio files and passwords. Photos and videos imported from the gallery disappear from the camera roll and remain locked inside the vault. CalcSafe says stored files are encrypted and secured on the device, with no cloud storage, servers or uploads. Setup requires no account, and the calculator disguise can be customized with themes and colors. The listed feature set also includes a decoy vault and intruder alerts. CalcSafe provides download links for both Android and iOS and links to a Help Center and Contact page. Its Free plan costs nothing and includes all core features free forever, with no account needed.

NullVault stores photos, videos, files, and notes in separate encrypted vaults, each opened with its own pattern. Entering a pattern opens the matching vault without showing a master list or the number of vaults. Within a vault, users can organize content into collections, search, and sort; they can capture or import items and deliberately export selected ones. Exported copies are outside NullVault’s protection.

Local vaults work offline without a NullVault account or server. The maker describes Android encryption using AES-256-GCM, Argon2id, and Android Keystore material; its iOS description lists AES-256-GCM, Argon2id, Apple CryptoKit, and libsodium. iOS supports encrypted iCloud backup and controlled read-only sharing through CloudKit, while Android supports portable encrypted backups. The free iOS plan allows up to five vaults and 20 items total, with one collection per vault. Compatibility is listed for iPhone running iOS 26 or later and Android phones running Android 10 or later. The maker warns that a compromised device may expose patterns, keys, screens, or plaintext, and that hidden vaults do not make encrypted data impossible to detect.