Legal

End User License Agreement

Effective Date: July 22, 2026  ·  Dual Stage LLC (DBA: Dual Stage Amplification)

Please read this End User License Agreement ("Agreement") carefully before downloading, installing, or using StringsTheory (the "Software"). By installing or using the Software, you agree to be bound by the terms of this Agreement. If you do not agree to these terms, do not install or use the Software.

1. License Grant

Subject to the terms and conditions of this Agreement, Dual Stage LLC (DBA Dual Stage Amplification) ("Licensor") grants you a limited, non-exclusive, non-transferable, revocable license to install and use StringsTheory on devices you own or control for your personal or internal business purposes.

For StringsTheory INV, feature access is governed by your active subscription plan (Monthly or Annual), billed through our payment processor as described in the Terms of Service. For one-time-purchase products — including StringsTheory Privacy Edition, StringsTheory Tech Tools, and StringsTheory Design — a perpetual license to the purchased major version is granted upon payment, with updates as described in Section 7.

2. License Restrictions

You may not:

3. Accounts, Activation, and Feature Access

StringsTheory INV subscriptions are linked to your account. Signing in activates the features included in your plan, and plan features may be used on devices you own or control (multi-user access on the Annual plan is subject to seat limits). StringsTheory Privacy Edition activates with an offline cryptographic license key and requires no account. Licensor may verify subscription or license validity and may suspend access if a subscription or license key is fraudulently obtained, shared, or otherwise misused.

4. Ownership and Intellectual Property

The Software is licensed, not sold. Licensor retains all right, title, and interest in and to the Software, including all intellectual property rights. This Agreement does not grant you any rights to Licensor's trademarks, service marks, or trade names.

5. Your Data

You retain ownership of all data you enter into the Software. Licensor does not claim any ownership over your inventory data, work order records, customer information, or other content created through use of the Software.

If you use Cloud Sync (included with the Annual plan), your data is stored on Licensor's servers to facilitate syncing across devices. Licensor handles this data as described in the Privacy Policy.

6. Third-Party Services

The Software may integrate with third-party services including Google Sheets, Square POS, and Shopify. Your use of these services is governed by their respective terms of service and privacy policies. Licensor is not responsible for the operation or availability of third-party services.

7. Updates and Support

Licensor may provide updates, bug fixes, or new versions of the Software at its sole discretion. Updates may be delivered automatically via the Sparkle update framework on macOS. Licensor reserves the right to modify, discontinue, or end-of-life any feature or version of the Software with reasonable notice where practicable.

8. Disclaimer of Warranties

THE SOFTWARE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. LICENSOR DOES NOT WARRANT THAT THE SOFTWARE WILL BE ERROR-FREE, UNINTERRUPTED, OR FREE FROM SECURITY VULNERABILITIES.

9. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, LICENSOR SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING LOSS OF PROFITS, DATA, BUSINESS, OR GOODWILL, ARISING OUT OF OR IN CONNECTION WITH YOUR USE OF OR INABILITY TO USE THE SOFTWARE, EVEN IF LICENSOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

IN NO EVENT SHALL LICENSOR'S TOTAL LIABILITY TO YOU EXCEED THE AMOUNT YOU PAID FOR THE SOFTWARE IN THE TWELVE MONTHS PRECEDING THE CLAIM.

10. Indemnification

You agree to indemnify, defend, and hold harmless Licensor, its officers, directors, employees, and agents from and against any claims, liabilities, damages, losses, and expenses arising out of or in connection with your use of the Software, your violation of this Agreement, or your violation of any third-party rights.

11. Termination

This Agreement is effective until terminated. Your rights under this Agreement will terminate automatically if you fail to comply with any of its terms. Upon termination, you must cease all use of the Software and delete all copies. Sections 4, 7, 8, 9, 10, and 12 survive termination.

12. Governing Law

This Agreement shall be governed by and construed in accordance with the laws of the State of Connecticut and applicable federal law of the United States, without regard to conflict of law provisions.

13. Changes to This Agreement

Licensor may update this Agreement from time to time. The most current version will be posted at this URL. Continued use of the Software after any changes constitutes your acceptance of the revised Agreement.

14. Contact

If you have questions about this Agreement, please contact us at info@stringstheoryinv.com or through the contact page.

Dual Stage LLC (DBA: Dual Stage Amplification) · StringsTheory