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Tasks with priority and due dates
Title, description, priority (none / low / medium / high / urgent), optional due date. Filter by All / Active / Completed. The list syncs across your devices.
Use case
Tasks fits naturally into this flow.
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Application · uTodo
Tasks.
Encrypted by default.
Encrypted to-do list
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What you can do
What you can do
What you can do with Tasks.
02
Encrypted personal storage
All tasks live in the encrypted Personal Storage layer — never on the server in clear text. The server only ever sees ciphertext blobs.
Use case
Tasks fits naturally into this flow.
03
Convert any message into a task
From uChat, tap “create task from message” and the message becomes a task with full context preserved. No copy-paste, no context loss.
Use case
Tasks fits naturally into this flow.
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Security
Security
Security for Tasks.
Every UltimaOS app shares the same post-quantum cryptographic stack, so the security properties below apply uniformly. App-specific considerations are noted where they apply.
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Post-quantum cryptography by default
All authentication and key exchange uses NIST-standardized ML-DSA-65 (FIPS 204) signatures and ML-KEM-768 (FIPS 203) key encapsulation. There is zero RSA, zero elliptic-curve, zero classical-only crypto in the authentication path. Defeats store-now-decrypt-later attacks.
02
End-to-end encryption on your device
Every payload is encrypted in your browser using XChaCha20-Poly1305 (RFC 8439) with a 192-bit nonce and a Poly1305 authentication tag. The plaintext exists only in your tab's memory. When you close the tab, the plaintext is gone.
03
Zero-knowledge server
The UltimaOS server only ever stores ciphertext and public keys. We cannot read your data — by design, not by promise. There is no encryption backdoor, no master key, no key escrow.
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Multi-device sync, single private key
Your private key is derived from your passphrase using Argon2id with high parameters. New devices derive the same key locally and can decrypt your entire history. The passphrase is never sent to the server — it is verified by an ML-DSA-65 signature on a server-issued challenge.
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How it works
How it works
How Tasks works.
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01
Open Tasks in your browser
UltimaOS runs in any modern browser — Chrome, Firefox, Safari, Edge. Nothing to install. Sign in with your passphrase-derived key, or restore from a 3-of-5 social recovery if you are on a new device.
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02
Your data is encrypted before it leaves your device
Every action — sending a message, uploading a file, creating a task, scheduling an event — is encrypted with XChaCha20-Poly1305 and authenticated with an ML-DSA-65 signature before any byte crosses the network boundary.
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Server stores ciphertext, returns it on demand
The UltimaOS server keeps an opaque blob per account and per conversation. When you open Tasks, the encrypted blobs are streamed to your device, decrypted locally, and rendered. The server never sees plaintext.
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Changes sync to every device you sign in on
Any change you make is encrypted and uploaded; every other device you are signed in on pulls the new ciphertext and decrypts it. Live multi-device sync, with the cryptography guarantee that only your devices can read it.
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Inside the suite
Inside the suite
How Tasks fits in the suite.
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Boards
Each task can attach to a Boards card. Cards inherit task completion states.
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Calendar
Tasks with due dates appear in Calendar. Completing a task closes its calendar entry.
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Notes
Tasks can be created from Notes highlights. The note fragment is kept as task context.
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Account
Tasks are encrypted in your Personal Storage layer. Recovery via Account covers Tasks too.
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Get started
Get started
Get started with Tasks.
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Open Tasks in your browser
UltimaOS runs in Chrome, Firefox, Safari and Edge. Nothing to install. Sign in with your passphrase to derive your private key locally.
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Open the workspace and launch Tasks
The launcher shows every app. Tasks is right there with its capsule video preview. Click to open.
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Connect it with the rest of the suite
Tasks works alone, but it shines when combined with the rest of the UltimaOS apps. Same private key, same encryption, one workspace.
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Frequently asked
Common questions
Questions about Tasks.
Is Tasks end-to-end encrypted?
Short answer
Yes. All content in Tasks is encrypted in your browser using XChaCha20-Poly1305 with a fresh key per item. The UltimaOS server only ever stores ciphertext and public keys — it cannot decrypt your data, no matter who asks.
What cryptography does Tasks use?
Short answer
Tasks uses the same post-quantum stack as every other UltimaOS app: ML-DSA-65 (FIPS 204) for authentication, ML-KEM-768 (FIPS 203) for key encapsulation, XChaCha20-Poly1305 (RFC 8439) for symmetric encryption, HKDF-SHA256 for key derivation, and Argon2id for passphrase hashing.
Can I use Tasks on multiple devices?
Short answer
Yes. Sign in on any device with your passphrase and the same private key is derived locally. All your Tasks content is then decrypted from the encrypted blobs the server returns. Changes sync live across all signed-in devices.
Is Tasks GDPR-compliant?
Short answer
Yes. UltimaOS is built and operated in the European Union by an EU company. The architecture is GDPR-compliant by design — encrypted data, EU-only infrastructure, no US CLOUD Act exposure, no advertising, no third-party trackers. See the GDPR page for the full breakdown.
How much does Tasks cost?
Short answer
During early access, UltimaOS is free for individuals and organizations. After early access, pricing will be per-seat with accessible family tiers and per-organization plans for businesses. There is no per-app add-on.
Can I export my Tasks data?
Short answer
Yes. UltimaOS supports encrypted export of all your content for backup and portability. The export is encrypted to a key you control; you can store it on your own infrastructure or in a personal encrypted backup.
Can I share a task list with my team?
Short answer
Yes. Tasks can be personal, shared with specific contacts, or attached to a Boards project. Sharing reuses the same encrypted storage layer as the rest of your content.