Last updated: November 7, 2026

These Terms of Service (the "Terms") are an agreement between you and EEPSS LLC, a California limited liability company ("EEPSS," "we," "us," or "our"). They cover your use of the website eepss.net (the "Site") and of the eeSimu software (the "Software"), including any license you buy.

By using the Site or the Software, or by buying a license, you agree to these Terms. If you accept them on behalf of a company or other organization, you confirm that you have authority to do so, and "you" means that organization. If you do not agree, do not use the Site or the Software.

1. Ownership

The Site and the Software, including their text, images, source code and documentation, are owned by EEPSS and protected by copyright and other intellectual property laws. Except for the rights these Terms expressly give you, we keep all rights in them.

2. Accounts

You need a free account to download the Software, read the user guide or buy a license. You can sign up with an email address and password, or sign in with Google. You agree to:

• give accurate and complete information, and keep it up to date
• keep your password confidential
• tell us promptly if you believe someone has used your account without permission

You are responsible for what happens under your account.

3. Software license

3.1 License grant

The Software is licensed, not sold. When you have paid for a license, we grant you a non-exclusive, non-transferable license to install and use the Software for your internal business purposes, limited to the analysis modules, the number of computers and the license term shown in your order.

3.2 Computers and activation

Each license covers the number of computers in your order. The Software is activated on each computer and checks its license with our server from time to time. You can see your activated computers in My Account and deactivate one to move the license to another computer, but the number of activated computers may never exceed the number you have paid for.

3.3 Restrictions

You may not:

• share license keys or activations with anyone outside your organization
• rent, lend, resell or sublicense the Software, or offer it as a hosted service to others
• get around or interfere with license activation or other protection measures
• reverse engineer, decompile or disassemble the Software, except where applicable law allows it despite this restriction
• remove copyright or other notices from the Software or its documentation

3.4 Free trial

We offer a free trial so you can evaluate the Software before you buy. If you need more time, contact us with your trial ID and we can extend it. One trial is available per computer. A trial is for evaluation only.

3.5 Updates and support

While your license is active, it includes updates to the Software and basic technical support by email.

3.6 Engineering results

The Software is a tool to assist qualified engineers. You are responsible for checking input data and results, applying professional engineering judgment, and complying with the codes, standards and regulations that apply to your work. Results from the Software are not a substitute for review by a qualified engineer. Do not use the Software to control equipment in real time, or for safety-critical decisions, without independent verification.

3.7 Your data

Your project files, models and results belong to you. We do not claim any ownership of them.

4. Orders, prices and payment

• Prices are in US dollars and are shown on the purchase page and at checkout. Prices may change, but a change does not affect a license term you have already paid for.
• Prices do not include taxes unless stated. Where we must collect tax, it is shown at checkout.
• Payments are processed by Stripe.
• We may refuse or cancel an order, for example if a price or product was shown in error. If we cancel an order after you have paid, we refund the payment in full.

5. License terms, renewal and cancellation

• Licenses are sold for 3, 12 or 36 months, and the full term is paid in advance.
• Automatic renewal: if you choose auto renew at checkout, your license renews at the end of each term for the same length, and your payment method is charged the price that applies at that time, until you cancel. Before a 12-month or 36-month license renews, we email you a reminder with the renewal date and price.
• Cancellation: you can turn off automatic renewal at any time in My Account under Manage subscription. Your license stays active until the end of the term you have paid for.
• If you do not choose auto renew, your license ends at the end of its term.
• If a renewal payment fails, we may suspend the license until payment is made.

6. Refunds

Because you can evaluate the Software with a free trial first, all purchases are final and we do not give refunds, except as stated in section 4 or where the law requires it. Cancelling automatic renewal stops future charges but does not refund the current term. Nothing in these Terms limits rights you have under consumer protection laws that cannot be waived.

7. Feedback

If you send us feedback, suggestions or ideas, you give us a non-exclusive, worldwide, royalty-free, perpetual license to use them to improve our products and services, without any obligation to you.

8. Acceptable use of the Site

You agree not to:

• copy or distribute content from the Site without our written permission, except as needed to use the Software
• try to gain unauthorized access to the Site, other accounts or our systems
• interfere with the operation of the Site, or with other users' use of it
• use the Site for anything unlawful

9. Disclaimer of warranties

To the fullest extent the law allows, the Site and the Software are provided "as is" and "as available," without warranties of any kind, express or implied, including warranties of merchantability, fitness for a particular purpose, accuracy and non-infringement. We do not warrant that the Site or the Software will be uninterrupted or error-free, or that results will be accurate for your particular system.

10. Limitation of liability

To the fullest extent the law allows:

• EEPSS is not liable for any indirect, incidental, special, consequential or punitive damages, or for lost profits, lost data, business interruption, or damage to equipment or property arising from the use of, or reliance on, the Site, the Software or its results.
• Our total liability for all claims relating to the Site and the Software is limited to the amount you paid us in the twelve (12) months before the claim.

11. Suspension and termination

We may suspend or end your access to the Site or the Software if you breach these Terms, for example by exceeding the number of licensed computers or sharing license keys. When your license ends, you must stop using the Software. Sections 1, 3.6, 3.7, 6, 7 and 9 to 15 continue after termination.

12. Export control

The Software is subject to US export control and sanctions laws. You may not use, export or re-export the Software in violation of those laws, including to a sanctioned country or to a person on a US government restricted-party list.

13. Privacy

Our Privacy Policy explains how we collect and use personal information, including the information the Software sends when it activates and checks a license, and the rights you have under the laws of California, the EEA, the United Kingdom, Switzerland and China.

14. Governing law and disputes

These Terms are governed by the laws of the State of California, USA, without regard to its conflict-of-law rules. Any dispute will be decided by the state or federal courts located in California, and you and we agree to their jurisdiction. If you are a consumer, this does not take away protection given to you by the mandatory laws of the country where you live.

15. Changes and language

We may update these Terms. The date at the top shows when they last changed. Changes take effect when posted, but a change to the price or terms of a paid license applies from its next renewal. If we make a material change, we will post a notice on the Site and, if you have an account, email you.

These Terms are written in English. A Chinese translation is provided for convenience. If the two versions differ, the English version governs.

16. Contact

For questions about these Terms, email info@eepss.net.

EEPSS LLC
eepss.net
info@eepss.net