Start with a passphrase.
Encrypt and decrypt text on your device. Generate a strong passphrase, then copy or share encrypted output with the person who needs it. Password mode and the security guide are free.
Datum
Encrypt text on your iPhone.
Encrypt and decrypt text locally with a passphrase. Add a portable container with Datum Pro.
For iPhone · iOS 18 or later
App Store availability will be announced here.
See how it works ↗Add a container.
Datum Pro unlocks a portable secret used alongside a separate strong message passphrase. Drawing contributes to container creation along with operating-system randomness. Protected exports use a separate export password.
Two messages, one packet.
Optional two-passphrase mode stores two messages in a common fixed-size container packet. Each passphrase opens only its matching message. Container features require Pro.
Free tools. One-time Pro.
Password encryption and decryption, passphrase generation, clipboard and sharing, privacy controls and the security guide are free. Every container operation requires Datum Pro, including creation, management and deletion, import and export, encryption and decryption, recovery, and two-passphrase mode.
Datum Pro is a one-time non-consumable purchase, with no subscription. The approved US base price is $5.99; Apple displays the actual price for your region. Existing containers remain stored when Pro is unavailable, but access requires Pro.
Keep your credentials safe.
Lost container copies or passphrases can make messages unrecoverable. Keep protected backups and credentials separately. Clipboard copies expire locally after 60 seconds, but other apps may retain copies. Clearing or backgrounding cannot guarantee erasure of external copies or all system memory.
Encryption runs locally. Datum has no custom account, analytics, messaging backend or message history. Apple handles purchases; sharing and file providers you choose may use their own services. A compromised device or an exposed passphrase can put content at risk.
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