D Dayseal private append-only journal

Local

01

One private record

Write it once.
Keep it honestly.

Sending seals an entry. Dayseal encrypts it on this device before automatic cloud backup. Corrections are new entries—history is never rewritten.

Vault passphrase At least 16 characters. It never leaves this device. Confirm passphrase One-time setup code Stored in the private setup file created during deployment.

••

Vault locked

Return to today.

Your passphrase decrypts the journal locally. The cloud stores only ciphertext.

Vault passphrase

Today

Your first sealed line becomes the beginning of the chain.

Adding a correction

Once sealed, the text cannot be edited or deleted.

Take your record with you

Export

About Dayseal

Private by construction

Install on iPhone: Safari → Share → Add to Home Screen → Open as Web App.
Encryption: AES-256-GCM entries; Argon2id passphrase protection.
Cloud: only ciphertext and minimal timing metadata reach Cloudflare D1.
Recovery: export an encrypted backup after setup and keep your passphrase separately.