About this app
A DIGITAL PEN ON YOUR PHONE OpenSig is the simple, private way to sign documents and create independently verifiable proofs for any file. No complex workflows and no file uploads. Sign PDFs, images, videos, design files, code, ZIPs and more directly with your device. Add optional encrypted notes to record purpose, intent or context. Use OpenSig to approve documents, lock in deliverables, protect your intellectual property, and timestamp important work. WHY OPENSIG? • Private by design – your documents never leave your device • Works with any file type and size • Create permanent, tamper-proof proofs • Add optional encrypted annotations such as purpose or message • No accounts, no uploads, no monthly subscription. Just verify your email and start signing • Independent verification: anyone with the file can verify your proof WHAT YOU CAN DO • Sign and approve documents • Prove authorship of creative work • Timestamp drafts, designs and revisions • Protect ideas, pitches and deliverables • Verify file integrity before handoff • Add short encrypted notes or URLs to your signature • Share proofs with clients, collaborators or auditors No uploads. No central storage. Just simple, verifiable signing you control.
Latest release
What’s New
Uses the 3rd party Pimlico bundler instead of the now defunct Biconomy bundler
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Sep 4, 2026 · 1:48 AM Free
Screenshots
