Deadline Proof

Erwin Newman

In-app purchases

About this app

Deadline Proof helps you create tamper-evident documentation for deadlines, submissions, disputes, and compliance records.

Log proof events with timestamps, timezone, notes, and stored attachments. Each entry is cryptographically linked into a hash chain so changes can be detected later. Export verification-ready reports when you need to share or preserve your record.

Designed to be local-first, private, and permanent — no accounts, no subscriptions.

🔐 Core features

• Create cases to organize important timelines
• Log proof events with timestamps and timezone
• Attach files and images (stored copies are hashed)
• Tamper-evident hash chain linking all events
• Search and pin important cases

⭐ Evidence Tools (one-time unlock)

• Tamper-evident PDF reports with chain summary
• Integrity verification to detect modifications
• Evidence bundle export (PDF + JSON + stored attachments)
• Secure backup and restore
• Unlimited cases

🛡️ Privacy & control

• Local-first storage (your data stays on your device)
• No ads, no tracking
• One-time purchase — unlock forever

Use cases
• Deadline and submission records
• Refunds and disputes
• Compliance documentation
• Work, school, or personal proof tracking

Important disclosure:
Deadline Proof provides tamper-evident documentation based on device-recorded timestamps and stored attachment hashes. It does not provide legal advice or certify documents. Always retain original source materials where applicable.