# COLOP Authentication App — COLOP e-mark secure

> COLOP e-mark secure (iPhone/iPad app by Colop Digital GmbH.)

- Source: https://appshunter.io/ios/app/colop-authentication-app/id1569392128 (this page in markdown: same URL + `.md`)
- Developer: [Colop Digital GmbH](https://appshunter.io/developer/1597279120)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 13.4 · 12 MB
- Languages: Arabic, Czech, English, French, German, Italian, Japanese, Korean, Malay, Polish and 4 more
- Released: 2021-09-22
- Data updated: 2026-02-24
- User reviews in markdown: https://appshunter.io/ios/app/colop-authentication-app/id1569392128/reviews.md

## What is COLOP Authentication App?

Give credibility to important documents by sealing them with the COLOP e-mark secure solution. 
The printed QR-codes lead automatically to the corresponding verification app on the App Store. These QR-codes contain the one and only key to access all information which is fully encrypted and scrambled.
For fast and simple authentication imprints, use the multiple-pages mode (User Registration needed). The following traceable details are then securely stored in a blockchain database:
- Authorized Organization
- Authorized Officer
- ID Number of the stamp device
- Location where the stamp was created
- Date, time and number of the stamp
For documents that require the highest security, use the scan-page mode. Besides above details, three more important pieces of information are stored:
- Notes made during the stamp creation (optional)
- Third party verification (optional)
- Original image of the document


## Version history (last 2 releases)

### 1.0.1 — 2021-09-28

Solved cross-compatibility issue

### 1.0 — 2021-09-22

No release notes.

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## More apps by Colop Digital GmbH

- [COLOP Verification App](https://appshunter.io/ios/app/colop-verification-app/id1543142521)
- [COLOP e-mark go](https://appshunter.io/ios/app/colop-e/id1597710472)

All apps by Colop Digital GmbH: https://appshunter.io/developer/1597279120

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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 2026-02-24.*