Legal
Terms of use
Last updated: September 15, 2026
Early access
Eigma is in active development, and everything it offers today is free to use. A paid plan with more cloud storage is coming later. While we build, features may change, move or be withdrawn, and the service may occasionally be unavailable. If a change takes something away from you, we will tell you before it takes effect.
Your account
You can use Eigma without an account. An account is what adds the cloud backup, syncing between your devices, and the community. Keep your sign-in details to yourself; anything done through your account is treated as done by you. You need to be at least 16 years old to have one. Accounts used for abuse may be suspended or closed.
Your content stays yours
Everything you put into Eigma remains yours and you keep every right you had in it. To run the service we need your permission to store your content and show it back to you: on the devices you use it on, and in the cloud backup that runs for your account while you are signed in and that you can turn off in Settings. We use it for nothing else. We do not sell it, we do not use it for advertising, and we do not train any model on it. You can export all of it at any time, and deleting your account removes our copy.
Publishing to the community
Publishing a volume puts a public, read-only copy of its pages and quizzes on eigma.app, where anyone can read it. By publishing you confirm that you have the right to share what is in it, and you give us permission to host and display that copy for as long as it stays published. You can unpublish it at any time. Publishing also lets anyone who reads your volume bring a copy of it into their own Eigma, and that copy is theirs from then on: unpublishing removes the volume from eigma.app, but it does not reach copies other people have already taken. Publish only what you are happy to hand over for good. We may take down published content that breaks these terms or the law, and if we do, you are told why and can appeal.
What you put in, and what you publish
You are responsible for the content you bring into Eigma and for anything you publish. Do not publish material you have no right to share, private information about other people, or anything unlawful. Ratings, reviews and comments are subject to the same rule, and may be removed if they break it.
Connected assistants
Connecting an assistant such as ChatGPT or Claude is your choice. That assistant is operated by another company, under its own terms and privacy policy, not ours, and Eigma is not affiliated with it. A connected assistant can read the parts of your wiki it needs in order to help you with them, so that content reaches that company and is handled under its policy; our privacy page lists exactly what it can see and what it never gets. Nothing the assistant sends back enters your wiki until you accept it in Eigma's review inbox, and you can withdraw its access at any time in Settings, under Connected assistants.
Pages can be wrong
The pages in your wiki come from a conversation with an assistant, and assistants make mistakes. Treat what you read as material to check, not as fact, and never as professional advice. For anything medical, legal or financial, ask someone qualified.
Using the service fairly
Do not attack, overload or attempt to disrupt Eigma, work around its limits, resell access to it, or take the community catalogue in bulk by automated means. Reading your own wiki through an assistant you connected is not covered by this: that is what the connector is for. Do not use Eigma to store or distribute malware. We may limit or close an account that does.
Keeping your own copy
Your wiki lives in your browser, and clearing your browser's site data deletes that copy. A cloud backup exists only if you are signed in, and there is one current copy of it rather than a history. Export a backup file if your wiki matters to you. We are not able to recover data that is gone.
Paid plans
Everything Eigma offers today is free and there is nothing to buy. A paid plan is planned, and its main addition is more cloud storage. What it costs and what it includes will be published before anyone can buy it, and we will not start charging for an account that is free today without telling you first and leaving you the choice to decline. When a paid plan launches it will have its own terms on top of these, including your rights as a consumer and how to cancel. Nothing on this page creates a payment obligation today.
Ending it
You can stop using Eigma whenever you like, and you can delete your account and everything stored with it from Settings, under Account. We may suspend or close an account that breaks these terms, and we will say why unless we are legally prevented from doing so. Export your data first if you want to keep it.
If Eigma has to stop
We would say so on this page and by email to everyone with an account, at least 30 days before your cloud backup is switched off, so that you have time to export your wiki. The copy on your own device is not affected.
What we are liable for
As far as the law allows, Eigma is provided as it is, and we are not liable for indirect or consequential loss, lost profits, or lost data. Nothing here limits liability that cannot be limited by law, which in Germany includes intent and gross negligence, injury to life, body or health, and liability under the Product Liability Act.
Changes to these terms
These terms will change as Eigma grows. The date at the top says when they last did. If a change materially affects you and you have an account, we will tell you before it takes effect.
Who you are agreeing with
Eigma is built and operated by Ya Wang, an independent developer in Germany. These terms cover the website at eigma.app and the app at my.eigma.app. Using either means you accept them. If you do not, please do not use Eigma. German law applies to these terms, and if you use Eigma as a consumer that does not take away the protection of the mandatory law of the country you live in. These terms work together with our privacy page and our Impressum, both linked in the footer. You can reach us at support@eigma.app.