End User License Agreement

Effective 27 September 2026

This agreement covers the DeckDiag app on every platform. Paragraphs marked App Store carry Apple’s required terms for copies obtained from Apple’s App Store.

1. Agreement

This End User License Agreement (“Agreement”) is between you and Eric Lyon (“Developer”, “we”, “us”). It governs your use of the DeckDiag application, its updates, bundled data and documentation (the “App”).

By installing or using the App you accept this Agreement. If you do not accept it, do not install or use the App.

App Store. If you obtained the App from Apple’s App Store, you and we acknowledge that this Agreement is concluded between you and Developer only, and not with Apple Inc. (“Apple”). Developer, not Apple, is solely responsible for the App and its content. Nothing in this Agreement overrides the Usage Rules in the Apple Media Services Terms and Conditions (the “Usage Rules”); where they conflict, the Usage Rules apply.

2. License

We grant you a limited, non-exclusive, non-transferable, revocable license to install and use the App for your personal or internal business purposes, including diagnosing, servicing, buying and selling equipment, subject to this Agreement.

App Store. The license is limited to use on Apple-branded products that you own or control, as permitted by the Usage Rules. Other accounts associated with the purchaser may use the App through Family Sharing or volume purchasing where the Usage Rules allow.

The App is licensed, not sold. We and our licensors keep all rights not expressly granted to you.

3. Restrictions

You may not, and may not allow anyone else to:

  • copy, modify, translate or create derivative works of the App, except as allowed by law;
  • reverse engineer, decompile or disassemble the App, except to the extent applicable law expressly permits it despite this restriction;
  • rent, lease, lend, sell, redistribute or sublicense the App;
  • extract, republish or sell the App’s bundled data (device profiles, test suites, parts reference) as a standalone product or database;
  • remove or alter any proprietary, trademark or legal notices in the App or its reports;
  • present a DeckDiag report as issued, certified or endorsed by any equipment manufacturer;
  • alter a report produced by the App and present it as the App’s unaltered output;
  • use the App in violation of any law.

4. Beta versions

Versions distributed through Apple TestFlight or marked “beta”, “preview” or “test” (“Beta Versions”) are pre-release software. They may contain errors, may be incomplete, and may stop working or expire at any time.

You use Beta Versions for evaluation. Do not rely on a Beta Version’s results for a sale, purchase, repair decision or live event. Feedback you send us may be used to improve the App without obligation to you. Please keep unreleased features confidential until we announce them.

5. Diagnostic results

The App helps you check equipment. Its results are an aid to your own judgment, not a guarantee, certification, warranty or appraisal of any equipment.

  • Scope. A PASS means only that the specific checks the App ran behaved as expected at that time. A unit can pass every check and still have faults the App does not or cannot test, or faults that appear later.
  • Method. Some checks are automated from signals the equipment sends; others rely on what you observe and enter. Automated results that rely on unverified protocol knowledge are labelled and are never shown as a clean PASS. Results marked “simulated” do not describe real equipment.
  • Your decisions. You are responsible for decisions you make with the App’s results, including buying, selling, pricing, accepting, repairing or using equipment at an event.
  • Reports. Reports show who performed the check and when. They are records of your session, not an independent inspection by Developer.

6. Service, safety and the parts reference

Opening, repairing or modifying equipment can be dangerous and may void its warranty. Mains-powered equipment contains hazardous voltages that can remain after it is unplugged. Only qualified persons should service power supplies or other safety-critical parts, and always according to the manufacturer’s service documentation.

The App’s parts reference is compiled from third-party public sources, cited in the App. It is provided for information only and may be incomplete, out of date or wrong for a particular unit, region, color or production revision. Links between parts and checked components are suggestions made by the App. Always confirm part numbers, positions and fitment against the unit and the manufacturer’s documentation before ordering or fitting a part. Availability shown is what a source listed when checked, not live stock or a price. We do not sell parts and are not responsible for third-party suppliers.

7. Independence and trademarks

DeckDiag is an independent product. It is not made, sponsored, authorized, approved or endorsed by AlphaTheta Corporation, Pioneer DJ, Allen & Heath, Panasonic / Technics or any other equipment manufacturer.

Product names, model names and trademarks shown in the App belong to their owners and are used only to identify compatible equipment. The App communicates with equipment passively and does not send commands to it.

8. Your data

The App works offline and needs no account. Sessions, reports, photos, names and part numbers you enter are stored on your device. We do not receive them unless you choose to send them to us. Our Privacy Policy explains this in full and forms part of this Agreement.

You are responsible for the content you enter and for having the right to record and share it, including photos, customer names and serial numbers. When you share a report or file from the App, the service you share it through handles it under its own terms.

9. Maintenance and support

Developer is solely responsible for providing any maintenance and support for the App, as described at deckdiag.com/support or by email at support@deckdiag.com. We have no obligation to provide updates, and features may change or be removed.

App Store. You and we acknowledge that Apple has no obligation whatsoever to furnish any maintenance or support services for the App.

10. Warranty disclaimer

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE APP IS PROVIDED “AS IS” AND “AS AVAILABLE”, WITH ALL FAULTS AND WITHOUT WARRANTY OF ANY KIND. DEVELOPER DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS OR IMPLIED, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, QUIET ENJOYMENT AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE APP WILL DETECT EVERY FAULT, THAT ITS RESULTS OR PARTS INFORMATION WILL BE ACCURATE OR COMPLETE, OR THAT IT WILL WORK WITH ANY PARTICULAR EQUIPMENT, FIRMWARE, CABLE OR DEVICE.

App Store. Developer is solely responsible for any product warranties, whether express or implied by law, to the extent not effectively disclaimed. If the App fails to conform to any applicable warranty, you may notify Apple, and Apple will refund the purchase price (if any) for the App to you. To the maximum extent permitted by applicable law, Apple has no other warranty obligation whatsoever with respect to the App. Any other claims, losses, liabilities, damages, costs or expenses attributable to any failure to conform to any warranty are Developer’s sole responsibility, subject to this Agreement.

11. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, DEVELOPER WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY OR PUNITIVE DAMAGES, OR FOR LOSS OF PROFITS, REVENUE, DATA, GOODWILL, BOOKINGS OR PERFORMANCE FEES, EQUIPMENT DAMAGE, OR THE COST OF SUBSTITUTE EQUIPMENT OR SERVICES, ARISING FROM OR RELATED TO THE APP OR THIS AGREEMENT, HOWEVER CAUSED, EVEN IF ADVISED OF THEIR POSSIBILITY.

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, DEVELOPER’S TOTAL LIABILITY FOR ALL CLAIMS ARISING FROM OR RELATED TO THE APP OR THIS AGREEMENT IS LIMITED TO THE GREATER OF (A) THE AMOUNT YOU PAID FOR THE APP IN THE 12 MONTHS BEFORE THE CLAIM AROSE AND (B) US$50.

Some jurisdictions do not allow certain disclaimers or limitations, so some of the above may not apply to you. Nothing in this Agreement limits liability that cannot be limited by law, including for death or personal injury caused by negligence, or fraud, or your statutory rights as a consumer.

12. Product claims

Developer, not Apple, is responsible for addressing any claims by you or any third party relating to the App or your possession and use of it, including: (i) product liability claims; (ii) any claim that the App fails to conform to any applicable legal or regulatory requirement; and (iii) claims arising under consumer protection, privacy or similar legislation. This Agreement does not limit Developer’s liability to you beyond what applicable law permits.

You agree to indemnify Developer against third-party claims arising from your misuse of the App, your breach of this Agreement, or repairs, sales or other acts you carry out in reliance on the App, to the extent permitted by law.

13. Intellectual property

The App, its code, design, name, logo, device profiles, test suites and report layouts are owned by Developer or its licensors and are protected by copyright, trademark and other laws. “DeckDiag” and the DeckDiag logo are trademarks of Developer. Open-source components are licensed under their own terms, listed in the App.

In the event of any third-party claim that the App or your possession and use of it infringes that third party’s intellectual property rights, Developer, not Apple, will be solely responsible for the investigation, defense, settlement and discharge of that claim.

14. Export and legal compliance

You represent and warrant that (i) you are not located in a country that is subject to a U.S. Government embargo, or that has been designated by the U.S. Government as a “terrorist supporting” country; and (ii) you are not listed on any U.S. Government list of prohibited or restricted parties. You will comply with all export and import laws that apply to your use of the App.

15. Third-party terms

You must comply with applicable third-party terms of agreement when using the App, for example your wireless data service agreement, the terms of the App Store, and the terms of any service you use to share reports. Links to third-party websites, including parts sources, are provided for convenience; we do not control and are not responsible for them.

16. Termination

This Agreement applies until terminated. Your rights under it end automatically if you breach it. You may end it at any time by deleting the App. On termination you must stop using the App and delete all copies. Sections 3, 5–7 and 10–19 survive termination.

17. Governing law

This Agreement is governed by the laws of the State of Arizona, USA, without regard to its conflict-of-law rules. The courts located in Maricopa County, Arizona have exclusive jurisdiction, except that either party may bring an individual claim in small-claims court. If you are a consumer living in the European Union, the United Kingdom or another country whose law gives you the right to use your local courts and laws, you keep those rights. If any provision is held unenforceable, the rest of this Agreement remains in effect.

18. Changes

We may update this Agreement. The version in effect is available at deckdiag.com/terms with its effective date. If a change is material, we will tell you in the App or with the update. Continuing to use the App after the change takes effect means you accept it.

19. Apple as third-party beneficiary

App Store. You and we acknowledge and agree that Apple and Apple’s subsidiaries are third-party beneficiaries of this Agreement, and that, upon your acceptance of this Agreement, Apple will have the right (and will be deemed to have accepted the right) to enforce this Agreement against you as a third-party beneficiary.

20. Contact

Questions, complaints or claims about the App:

Eric Lyon
Mesa, Arizona, USA
Email: support@deckdiag.com