# NACRE — NACRE

> Blockchain-based app for seafarer certificate authentication and identity verification. (iPhone/iPad app by Electi Consulting Ltd.)

- Source: https://appshunter.io/ios/app/nacre/id1533778492 (this page in markdown: same URL + `.md`)
- Developer: [Electi Consulting Ltd](https://appshunter.io/developer/1533778494)
- Category: Business
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 8.0 · 49 MB
- Released: 2020-10-03
- Data updated: 2026-07-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nacre/id1533778492/reviews.md

## What is NACRE?

Nacre is a mobile app that seafarers will use in order to be personally authenticated and to prove authenticity of the maritime training certificates they possess.
More specifically, during the crewing process the seafarer arrives at the crewing office and needs to first be authenticated and then checked for the certificates they possess.
If the seafarers do not posses the appropriate certificates they cannot serve on a specific ship.
There exists a problem of forgeries of such training certificates and a developed blockchain-based solution, that the Nacre app is part of, tries to mitigate this.
The Nacre app has the following functionalities:
1. The seafarer logs in and navigates to the tab “My certificates”. Under this tab the list of the certificates that have been issued to the person logged in the app are displayed. These certificates are immutable and reside on a
Private blockchain. The crewing office can thus verify that the displayed certificates under the “My Certificates” tab are valid and authentic.
2. When the seafarer appears at the crewing office they also need to prove their identity. In order to achieve this the admin at the crewing office using a separate web application issues a QR code challenge.
   The seafarer, then selects the tab “Proof of Identity” and clicks the “Scan Challenge” button. The mobile phone camera turns on and the seafarer scans the QR code displayed on the screen of the admin.
   The seafarer will be notified about the status of the Challenge Response and informed if their identify was verified or not.
3. A support tab is also available in case the user encounters any problems.

## Key features

- Digital certificate management
- Blockchain-based authenticity
- QR code identity verification
- Seafarer authentication
- Support tab for issues


## Frequently asked questions about NACRE

### How does NACRE ensure certificate authenticity?

NACRE utilizes a private blockchain to store maritime training certificates. This makes the certificates immutable and allows crewing offices to easily verify their authenticity through the app.

### Can NACRE be used to prove my identity?

Yes, NACRE facilitates identity proofing through a QR code challenge system. An administrator issues a QR code, which you scan with the app to verify your identity.

### What devices does NACRE support?

NACRE is designed for iOS devices, including iPhones and iPads.

### Is NACRE available for free?

Yes, NACRE is available for free download and use, with no in-app purchases or advertisements.

### How often is NACRE updated?

The latest version of NACRE is 12.0, and it was last updated on September 14, 2021. Specific update frequency is not detailed, but the app has seen version updates.

### What is the age rating for NACRE?

NACRE has an age rating of 4+, making it suitable for a wide range of users.

### What if I encounter problems with NACRE?

NACRE includes a dedicated support tab to assist users who encounter any issues or have questions regarding the app's functionality.

### What is the user sentiment for NACRE?

Based on the available data, NACRE has a rating of 1.0 stars from 1 rating, indicating a very low user satisfaction score at this time.

## Version history (last 5 releases)

### 12.0 — 2021-09-14

null check for expiration date

### 10.0 — 2021-09-08

Remove Username from Registration Page

### 9.0 — 2021-05-27

Simplify login flow ,download and share certificates, minor ui changes

### 3.0 — 2020-10-06

View some more fields in certificate details.

### 2.0 — 2020-10-03

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 2026-07-07.*