Archived App (Last seen on 19 Mar 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
NOTRZR is an App, which allows to establish proof that your were in possession of information and data at a certain point in time. The App makes use of the unique feature of blockchain to maintain a tamper proof timestamp of everything that is written. In addition it uses a cryptographically secured way to proof authenticity and origin of the data. Writing data to blockchain is usually a difficult task, but with NOTRZR it becomes simple and can be performed by anyone without the need of a third party. The App allows to take snapshots or upload files and proofstamp them on blockchain. In combination with the Web Application of NOTRZR, which requires neither login nor any installation to view and read data, the App is a powerful tool for privates and businesses alike to create all kinds of documentation that need a reliable timestamp and might require proof of authenticity.
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What's New in NOTRZR
1.6
September 12, 2023
In our new version we added support for Proof of Key QR codes, added Transaction's Details and update transactions UI. General app performance was improved.
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