AppMarketSpy › Productivity › ZeFirst: Proof of Existence
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App info
- Developer
- LGM CONSEIL LTD
- Category
- Productivity, Business
- Released
- Oct 5, 2026
- Version
- 1.2.9 (Oct 22, 2026)
- Price
- Free
- Size
- 2.9 MB
- Requires
- iOS 26.2
- Age rating
- 4+
- Languages
- English, French, German, Italian, Spanish
In-app purchases
| 1 credit | $0.99 |
| 10 credits | $3.99 |
Current prices, App Store US.
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About ZeFirst: Proof of Existence
An idea, a design, a manuscript, code, an invention… The day you have to prove you were first, what do you do? With ZeFirst, in about thirty seconds you get a proof timestamped to the second that nobody can alter, erase or backdate – not even us. READY FOR IPHONE DUO Open it and ZeFirst switches to two columns: your file on one side, your proof on the other. Drag a photo from Photos or Files and it is timestamped as is. Closed, everything fits on the outer display. Also on iPad. HOW IT WORKS • Pick a file: document, image, code, audio, any format. • Your device computes its digital fingerprint (SHA-256): 64 unique characters that can't be reversed. • Your file never leaves your device. Only the fingerprint is sent. • ZeFirst records it on a public blockchain, with the exact date and time. • You get a PDF certificate with a QR code and a verification link to share. VERIFIABLE WITHOUT US…
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