# ZeFirst — Prove you were first

> Prove you were first (iPhone/iPad app by LGM CONSEIL LTD.)

- Source: https://appshunter.io/ios/app/zefirst/id6794245715 (this page in markdown: same URL + `.md`)
- Developer: [LGM CONSEIL LTD](https://appshunter.io/developer/6794245717)
- Category: Productivity, Business
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.2 · 3 MB
- Languages: American English, French (France), German (Germany), Italian, European Spanish
- Released: 2026-10-05
- Data updated: 2026-10-07

## What is ZeFirst?

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.

HOW IT WORKS
• Pick a file: document, image, code, audio, any format.
• Your iPhone 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
Every proof carries its references: network, contract, transaction and a link to the public explorer. Anyone can re-verify it from your file, even if ZeFirst disappeared one day.

WHO IS IT FOR?
Writers, creators, designers, developers, inventors, photographers, musicians, students, founders: anyone who shares files and wants to be able to say "this was mine, first".

EVERYTHING YOU CAN DO
• Create a proof of prior existence in a few taps
• Verify a file or a fingerprint, even without an account
• Find all your proofs in "My proofs"
• Download your PDF certificate, with QR code
• Share a verification link
• Co-ownership: record a proof together, with each person's share
• Back up access to your account so you never lose it
• 5 languages, light or dark theme

SIMPLE, NO CRYPTO
Sign in with your e-mail (a one-time code), with Apple or with Google. No password, no cryptocurrency to buy: blockchain fees are on us. Your first 2 proofs are free. After that, refer a friend or buy credits in the app (1 credit = 1 proof).

Your account also works on the web, at zefirst.app.

Good to know: ZeFirst proves that a file existed, exactly as it is, on a given date. It is not a patent or trademark filing. Tip: record your file before sharing it, and keep the original untouched.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 10 credits | $3.99 | one-time |
| 1 credit | $0.99 | one-time |


## Is ZeFirst safe?

Not enough ratings yet to assess ZeFirst.

## Is ZeFirst legit?

ZeFirst has limited verification signals. The AppsHunter Legitimacy Score for ZeFirst is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.1.5 — 2026-10-06

What's new in 1.1
• Co-ownership: hand each co-author their share. From “Proofs”, open the proof and send them an invitation link; they accept, you confirm.
• Sign in with Google or Apple: you now stay signed in after closing the app.
• Fixes and improvements.

### 1.0.1 — 2026-10-06

What's new in 1.0.1
• Sign in with Apple or with Google, in addition to the e-mail code.
• Clearer wording: you “record” a proof.
• Account deletion: the screen now states what is erased and what is kept.

### 1.0.0 — 2026-10-05

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-07.*