Seal

Arkon Technology

In-app purchases

About this app

Seal — Seal your word.

Loans between friends, freelance gigs, second-hand sales, appointment fees, contractor jobs… Verbal promises stay off the record, and later turn into "I never said that" disputes. Seal turns spoken agreements between two people into cryptographically sealed, independently verifiable digital receipts.

How it works
1. Pair with the other party via QR code or 6-character code.
2. Compose the agreement together (pick a template: debt, freelance, sale, appointment, contractor).
3. The other party approves or proposes edits.
4. Once both parties approve, the agreement is cryptographically sealed.
5. Download as PDF or share the verification link — anyone can independently confirm validity.

Security stack
• Ed25519 digital signatures — each device holds its own private key
• SHA-256 content hash — guarantees the agreement hasn't been altered
• Append-only audit chain — every action contains the previous action's hash
• WhatsApp OTP phone verification — proves identity
• TLS 1.3 end-to-end encrypted transport
• Sealed agreements are immutable

Use cases
• Personal loans: Record money you lend to a friend, with the repayment date.
• Freelance contracts: Scope, deadline, fee, acceptance criteria — written down and signed.
• Sale agreements: Used cars, phones, furniture — price and condition on record.
• Appointments / services: Date, time, location, fee — clear mutual confirmation.
• Contractor jobs: Scope, unit price, exclusions, acceptance criteria.

Independent web verification
Every sealed agreement is verifiable at getseal.app/verify/SEAL-XXXX — a public page anyone can open. It shows the parties, the agreement content, signing timestamps, and cryptographic proof. Third parties or legal reviewers can inspect it independently.

Privacy
• Your agreement contents are never shared with anyone.
• Your phone number is sent only to Twilio, and only for WhatsApp OTP verification.
• On the public verify page, phone numbers appear masked (e.g. +90•••1234).
• Account deletion: request via getseal.app/account-deletion

Operator: Arkon Technology
Contact: [e-mail]
Web: getseal.app

What’s new

First public release: create tamper-proof digital receipts for agreements between two people, sealed with cryptographic signatures and verifiable by anyone.