Terms of Use
Last updated: May 2026
This is a legal agreement between you, the end user, and the developer of Papyrium (the "Author"). It sets out the rules around using Papyrium (the "Software") — what you can do with it, what stays yours, and where the Author's responsibilities begin and end. By installing or using the Software, you accept these terms. If you don't accept them, please don't install or use the Software.
License to use Papyrium
During the public alpha, Papyrium is free to download and use for personal, non-commercial purposes. You're welcome to install it on your own devices and use it with your own books and documents.
Once Papyrium leaves alpha, the app will move to a one-time-purchase license. The terms of that license — including how many devices it covers, transferability, and updates — will be published here when the paid version launches.
Your books and content
Books, documents, annotations, highlights, notes, tags, and any other content you import into or create with Papyrium remain yours, or the property of their respective rights holders. Papyrium does not host, transmit, or claim any rights to your content. Everything stays on your device.
Acceptable use
You're responsible for making sure you have the legal right to import and use any content with Papyrium. The app is intended for use with works you legally own, have legally obtained, or that are in the public domain.
Papyrium does not endorse or facilitate copyright infringement. The app is a tool — how you use it is your responsibility.
Restrictions
You may not reverse engineer, decompile, or disassemble Papyrium, except to the extent expressly permitted by applicable law. You may not redistribute, sell, rent, or sublicense the app, or remove or alter any copyright, trademark, or other proprietary notices.
No warranty
Papyrium is provided "as is", without warranty of any kind, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, and non-infringement. The app may contain bugs, behave unexpectedly, or change between versions. Use it at your own risk.
Limitation of liability
To the maximum extent permitted by law, Papyrium and its developer are not liable for indirect, incidental, special, or consequential damages — including loss of data, loss of use, or interruption of work — arising from your use of the app.
Always keep backups of your books, notes, and library data. Papyrium tries hard not to lose anything, but no software is perfect, and your most important files deserve redundant copies elsewhere.
During the alpha
The public alpha is offered on a best-effort basis. There's no guaranteed support schedule, no service-level commitments, and no promise that any specific feature present today will be present in the final release. Things will change. If something breaks or is missing, the best place to flag it is by emailing hello@papyriumlib.com or opening a bug report on GitHub.
Third-party software
Papyrium is built on a number of open source libraries — see the credits page for the major ones. Their licenses apply to the portions of the app derived from their code; using Papyrium does not transfer any rights in those libraries to you beyond what their respective licenses grant.
Changes to these terms
Papyrium evolves, and these terms will too. When that happens, the date at the top of this page reflects the most recent revision. Continued use of the app after a change means you accept the updated terms.
Governing law and contact
These terms are governed by the laws of Lithuania. Any dispute that can't be resolved informally falls under the jurisdiction of the courts of Lithuania. If any provision of these terms is found unenforceable, the remaining provisions will remain in full effect.
Questions about these terms can go to hello@papyriumlib.com.