Terms of Service

Effective 26 September 2026 · DecimaWorks · george@decimaworks.com

1. Who this agreement is between

These terms are an agreement between you and DecimaWorks (“DecimaWorks”, “we”, “us”). They apply when you download, install, sign in to or use the Nexus desktop application (“Nexus” or “the software”) and the account services that support it.

By creating an account or using Nexus you accept these terms. If you use Nexus for an employer or another organisation, you confirm that you have the authority to accept these terms for that organisation, and “you” includes it.

Our Privacy Policy explains what data we collect and how we handle it. It is part of this agreement.

2. What Nexus is

Nexus is a desktop application. With your permission it reads your own Gmail mailbox and builds a private knowledge layer on your computer: the projects you work on, the commitments you and others have made, and the people in your network. It shows you what needs your attention. The knowledge layer lives on your computer. Our cloud service signs you in, holds your licence and, on plans that include AI, relays AI requests. See the Privacy Policy for the full data picture.

Nexus is an early product. We change it often, and some features are experimental. We describe the current state of the software on decimaworks.com and in the application itself.

3. Your account and invitation

• Invitation only. You need a single-use invitation code from DecimaWorks to create an account. The invitation sets your plan and its duration.
• One person, one account. An account is for one named person. Do not share your sign-in or let another person use your account.
• Accurate information. Give us correct contact information and keep it current.
• Security. You are responsible for the computer you run Nexus on and for keeping your Google account secure. Tell us at once at george@decimaworks.com if you believe someone else has used your account.
• Age. You must be at least 18 years old, or the age of majority where you live, to hold an account.

4. Your licence to use Nexus

While your plan is active and you follow these terms, we grant you a personal, limited, non-exclusive, non-transferable, revocable licence to install and run Nexus on computers you control, for your own work, up to the number of seats on your plan.

You may not, and may not let anyone else:

• copy, sell, rent, lend, sublicense or redistribute the software or your licence;
• reverse engineer, decompile or try to extract the source code of the software, except where the law lets you do so and we cannot exclude that right;
• remove or hide any notice of ownership in the software;
• use the software to build a competing product, or to train a machine-learning model on its output or behaviour;
• work around any security, licence or usage limit in the software or in our cloud service.

We and our licensors own the software and everything in it, including its design, code, models, prompts and documentation. Nothing in these terms gives you ownership of any of it. Nexus includes open-source components, each under its own licence; those licences apply to those components.

5. Plans, fees and AI usage

• Plans. We offer plans that differ in duration, the number of seats and whether AI processing is included. Your invitation names your plan. The plans and their terms may change over time; a change takes effect for you when your plan renews.
• Fees. Where a plan carries a fee, we tell you the fee, the billing period and the payment method before you accept it. Fees are stated without taxes; you pay any tax that applies. Fees are non-refundable except where the law requires a refund or we say otherwise in writing.
• AI included. On a plan that includes AI, Nexus sends AI requests through our metered relay to a third-party model provider. We may set a fair-use limit on AI usage per seat and we tell you when you approach it. We record usage counts to run the plan; we do not record the content of the requests. See the Privacy Policy.
• Your own AI key. On a plan without AI included, you supply your own AI provider and key. Your agreement with that provider governs those requests, and you pay that provider directly.
• Trials and free plans. We may offer a plan at no charge. We can change or end a free plan at any time with reasonable notice.

6. Acceptable use

Use Nexus only on mailboxes you own or are authorised to read. Do not use Nexus:

• to read another person’s mail without their consent and a lawful basis;
• in a way that breaks the law, including privacy, employment-monitoring, data-protection and export laws where you or your organisation operate;
• to break, probe or overload our cloud service or any third-party service Nexus connects to;
• to violate Google’s terms for the Gmail and sign-in services you connect.

If you use Nexus on a work mailbox, you are responsible for any consent or notice your employer or your local law requires.

7. Your data and your content

• You own your data. Your mail, and the knowledge layer Nexus builds from it, are yours. We claim no ownership of them.
• It stays with you. Nexus stores that knowledge layer on your computer. We do not receive it. On a plan with AI included, mail text is sent through our relay to a model provider to answer your request; we do not store it. The Privacy Policy describes this in full.
• Your responsibility. You are responsible for the mailbox you connect, for backing up your own computer and for how you use what Nexus shows you.
• Account records. We keep the account and licence records the Privacy Policy describes for as long as your account exists, and we delete them when you ask us to close it.

8. Google and other third-party services

Nexus connects to Google to sign you in and to read your Gmail with the read-only permission you grant. Google’s terms and privacy policy govern your Google account. You can withdraw Nexus’s access at any time at myaccount.google.com/permissions; Nexus then stops reading new mail. Our use of information from Google APIs follows the Google API Services User Data Policy, including its Limited Use requirements.

If you connect your own AI provider, or connect an AI tool to Nexus through the agent access feature, that provider’s or tool’s terms govern what it does with the data you send it.

9. AI output

Nexus uses AI models to read your mail and to write the summaries, commitments and project pages it shows you. AI output can be wrong, incomplete or out of date. Nexus shows the mail each statement rests on so that you can check it. Use your own judgment before you act on anything Nexus tells you. We are not responsible for decisions you make based on AI output.

10. Updates and changes to the software

Nexus checks for updates and installs them automatically so that every copy stays current and secure. We may require a minimum version to keep using the service. We may add, change or remove features at any time. If a change removes something important to you, you can end the agreement under section 13.

11. No warranty

We provide Nexus and our services “as is” and “as available”. To the fullest extent the law allows, we make no warranty of any kind, express or implied, including any warranty of merchantability, fitness for a particular purpose, accuracy or non-infringement. We do not promise that the software will be free of errors or interruptions, or that AI output will be correct. Some jurisdictions do not allow these exclusions; where that is the case, they apply to you only as far as the law permits.

12. Limitation of liability

To the fullest extent the law allows:

• we are not liable for any indirect, incidental, special, consequential or punitive damages, or for lost profits, lost data, lost business or the cost of substitute services, however caused;
• our total liability to you for all claims under or related to these terms is limited to the amount you paid us for Nexus in the twelve months before the event that gave rise to the claim, or 100 US dollars if you paid nothing.

These limits do not apply to liability that the law does not allow us to limit, such as liability for fraud or for death or personal injury caused by negligence.

You agree to defend and compensate us for claims by third parties that arise from your breach of these terms or from your use of Nexus in a way that breaks the law.

13. Ending the agreement

• By you. You can stop using Nexus at any time. Sign out, remove Nexus’s access at myaccount.google.com/permissions, uninstall the application and email us to close your account. Fees already paid for the current period are not refunded unless the law requires it.
• By us. We can suspend or end your access if you break these terms, if your plan ends or is not renewed, if we must do so to comply with the law, or if we stop offering Nexus. Where we can, we give you reasonable notice.
• What happens. When the agreement ends, your licence ends and you stop using the software. Your local knowledge layer stays on your computer for you to keep or delete. We delete your account record as the Privacy Policy describes.
• What survives. Sections 4 (ownership), 7, 9, 11, 12, 14 and 16 survive the end of the agreement.

14. Governing law and disputes

These terms are governed by the laws of the place where DecimaWorks is established, without regard to conflict-of-law rules, and the courts of that place have exclusive jurisdiction over any dispute about these terms, except that either side may seek an injunction in any court to protect its intellectual property. If you are a consumer, the mandatory consumer-protection law of the country where you live still applies to you.

Before either side starts a legal claim, we agree to try to resolve the dispute by discussion for at least 30 days after one side notifies the other in writing.

15. Changes to these terms

We may change these terms. When we do, we post the new version at decimaworks.com/terms with a new effective date, and for a material change we tell you in the application or by email before it takes effect. If you keep using Nexus after the effective date, you accept the new terms. If you do not agree, stop using Nexus and close your account.

16. Contact

Questions about these terms: george@decimaworks.com.

If any part of these terms is found unenforceable, the rest stays in force. These terms and the Privacy Policy are the whole agreement between you and us about Nexus. You may not assign this agreement; we may assign it to a successor of our business.