Terms of Service and Subscription Agreement

Effective Date: November 3, 2026

These Terms of Service and Subscription Agreement (the "Terms") form a legally binding agreement between you and DENTREMONT GUITARS, of 3451 HWY 3, Lower Argyle, Nova Scotia, Canada, B0W 1W0 ("we", "us", "our" or the "Operator"), concerning your access to and use of The Luthiers App.

By accessing or using The Luthiers App, creating an account, or purchasing a Pro subscription, you acknowledge that you have read and agree to these Terms. If you do not agree, you must not use the App or purchase a subscription. Please read these Terms carefully, particularly the provisions concerning calculation results, subscriptions, refunds, disclaimers and limitations of liability.

1. The App and its Services

1.1 The Luthiers App (the "App") is a digital software service providing calculators, reference tools and other resources for building, repairing and setting up guitars and other stringed instruments.

1.2 The App is made available through the website at luthiersapp.com and, when released, through iOS and Android applications.

1.3 The App offers both free and subscription-based features:

(a) Free Features: Most calculators and tools are available without creating an account. Free users may save up to three instruments locally on their device.

(b) Pro Subscription: A paid Pro subscription provides additional features, which may include:

• Cloud synchronization of saved instruments between devices;
• Unlimited saved instruments;
• The job tracker;
• Printing and exporting, including instrument specification sheets;
• Multi-scale fret calculators;
• Wood movement calculators; and
• Other additional features made available from time to time.

1.4 The availability and functionality of particular features may depend on the subscription plan, device, operating system, internet connection and App version.

1.5 We reserve the right to introduce, modify, improve or discontinue features, provided that we do not use this right to avoid our obligations concerning prepaid subscription periods or applicable consumer protection rights.

2. Eligibility and Accounts

2.1 You must be legally capable of entering into a binding agreement in your jurisdiction to create an account or purchase a subscription. The App is intended for adult users and is not directed at children.

2.2 An account is personal to one individual. You must not share your account or permit another person to access it as though they were you.

2.3 Account access is provided through a sign-in link sent to the email address associated with your account. There is no password.

2.4 You are responsible for:

• Providing a valid email address that you control;
• Maintaining the security of your email account;
• Protecting access to your sign-in links;
• Ensuring that your account information remains accurate; and
• All activities undertaken through your account, except to the extent caused by our breach of these Terms or applicable law.

2.5 Anyone with access to your email account may be able to obtain access to your App account. You must promptly notify us if you believe your account has been accessed without authorization.

2.6 We may suspend access to an account where reasonably necessary to investigate suspected unauthorized access, fraud, misuse or a security risk.

3. Calculations, Results and Technical Disclaimer

3.1 The App provides calculators and technical tools intended to assist with instrument building, repair and setup.

3.2 Calculations are based on formulas, reference materials, assumptions and data that we believe to be appropriate. We make reasonable efforts to maintain the accuracy and functionality of the App, but we do not guarantee that any calculation, measurement, result or recommendation is accurate, complete or suitable for every instrument, material or situation.

3.3 Results are estimates and guidelines only. They are not a substitute for independent measurements, professional judgment, practical testing or specialized technical expertise.

3.4 Instrument construction and repair involve variables that cannot always be accounted for by mathematical calculations. Materials, environmental conditions, manufacturing tolerances, instrument geometry, workmanship and other factors may affect actual results.

3.5 Certain calculations, including saddle compensation, wood movement and other predictive calculations, are inherently approximate and may produce results that differ from actual conditions.

3.6 You are solely responsible for independently verifying all results before relying on them or undertaking any work. In particular, you must verify measurements and calculations before cutting, drilling, routing, gluing, modifying or otherwise performing work that may be difficult or impossible to reverse.

3.7 We are not responsible for damage to instruments, materials, tools, equipment or other property resulting from your reliance on App calculations or results, except to the extent that such responsibility cannot lawfully be excluded.

3.8 You acknowledge that the App is a tool to assist with your own work and judgment. We do not provide professional instrument-building, engineering, manufacturing or repair services through the App.

4. Pro Subscriptions and Fees

4.1 Pro is offered as a recurring subscription. The available subscription prices are:

4.2 The applicable currency will be displayed at checkout, based on the currency and pricing option made available for your transaction.

4.3 Applicable sales taxes or other mandatory charges will be displayed at checkout where applicable.

4.4 A monthly subscription is billed monthly. A yearly subscription is billed annually. The subscription automatically renews for successive periods of the same length unless cancelled before the next renewal.

4.5 By purchasing a subscription, you expressly authorize recurring charges to the payment method you provide through Stripe, in accordance with the subscription frequency and price disclosed at checkout.

4.6 Your subscription begins when the payment is successfully processed and Pro access is activated.

4.7 Payment processing: Payments are processed by Stripe. We do not receive or store your complete credit card number or other full payment credentials. Your payment information is subject to Stripe's applicable terms and privacy practices.

4.8 You authorize Stripe to process recurring payments in accordance with your subscription selection until cancellation.

4.9 You are responsible for maintaining a valid payment method. If a payment fails, we or Stripe may attempt to process the payment again. We may suspend or restrict Pro access while a payment remains outstanding.

4.10 We may cancel a subscription where payment cannot be collected after reasonable attempts or where we reasonably suspect fraud or misuse.

4.11 We do not currently sell Pro subscriptions directly through the iOS or Android applications. If subscriptions are introduced through Apple or Google, those purchases will be subject to the applicable platform's payment, billing, cancellation and refund terms, together with any additional terms disclosed at the time of purchase.

5. Automatic Renewal and Cancellation

5.1 Your Pro subscription automatically renews unless you cancel it before the next renewal date.

5.2 You may cancel your subscription at any time through Account & Pro > Manage Subscription, or through another cancellation method we make available.

5.3 Cancellation takes effect at the end of the current paid subscription period. You will retain Pro access until that period ends and will not be charged for another subscription period.

5.4 Cancelling a subscription does not automatically delete your account or saved instruments.

5.5 We will provide any renewal reminders, notices of material price changes or other subscription notices required by applicable law. We may also provide additional reminders as a customer service measure.

5.6 Account deletion is different from subscription cancellation. If you choose to delete your account, your subscription will be cancelled and Pro access will end immediately upon deletion. You will not retain access to Pro features for the remainder of a prepaid period following account deletion, except where applicable law requires otherwise.

5.7 If you wish to retain access to Pro until the end of your current paid period, you should cancel your subscription without deleting your account.

6. Price Changes

6.1 We may change subscription prices from time to time.

6.2 We will provide notice of a price increase at least 30 days before it takes effect, or within any other period required by applicable law.

6.3 A price increase will apply only to a subsequent renewal and will not change the amount already paid for a current subscription period.

6.4 If you do not agree to a price increase, you may cancel your subscription before the increased price takes effect. Continued use or renewal after the applicable notice period will constitute acceptance of the revised price, subject to any mandatory consent requirements under applicable law.

7. Refunds

7.1 If you are dissatisfied with Pro, you may request a full refund of a subscription charge within 14 days of the date of that charge by contacting support@luthiersapp.com from the email address associated with your account.

7.2 If we approve a refund under this policy, the applicable subscription will be cancelled and Pro access will end when the refund is processed.

7.3 Outside the 14-day refund period, subscription charges are non-refundable, including amounts relating to unused portions of a subscription period following cancellation, except where:

• Applicable law requires a refund;
• We discontinue Pro and are unable to provide the remaining prepaid service; or
• We determine, in our discretion, that a refund is otherwise appropriate.

7.4 Refund requests will be assessed reasonably and in accordance with applicable consumer protection legislation.

7.5 Refunds for payments made through Apple or Google, if introduced in the future, may need to be requested through the relevant platform and will be subject to its applicable refund procedures and mandatory legal requirements.

7.6 Nothing in these Terms limits any statutory right to a refund, cancellation or other remedy.

8. When a Subscription Ends

8.1 When your Pro subscription expires or is cancelled at the end of its paid period:

• Your first three saved instruments will remain fully editable;
• Any additional saved instruments will become read-only;
• You may continue to view and open those instruments;
• You may view and print available specification sheets where the relevant functionality remains available; and
• You may delete saved instruments.

8.2 If you subscribe to Pro again, your previously saved instruments will become editable again, provided they remain stored in your account.

8.3 Pro features may require periodic communication with our servers to verify subscription status. Pro functionality may continue offline for up to one month after the App last successfully confirmed your subscription with our servers. Offline functionality is not guaranteed and may vary depending on the device and App version.

8.4 We do not guarantee indefinite storage of instruments or other user content. Our retention and deletion practices are described in our Privacy Policy.

9. Your Content and User Responsibilities

9.1 You retain ownership of the instruments, specifications, settings, notes, client information and other content that you enter into or save through the App ("User Content").

9.2 You grant us a limited, non-exclusive, worldwide, royalty-free licence to host, store, reproduce, transmit, display and process User Content solely as reasonably necessary to:

• Operate and provide the App and its features;
• Synchronize your instruments between your devices;
• Provide account and subscription services;
• Maintain, secure and troubleshoot the App; and
• Comply with applicable legal obligations.

9.3 This licence ends when the relevant User Content is deleted, subject to any temporary retention in backups or records that we are legally permitted or required to retain.

9.4 You are responsible for:

• The accuracy and legality of your User Content;
• Maintaining any independent copies or backups of important information;
• Ensuring that you have the necessary rights and permissions to enter, store and use User Content;
• Ensuring that User Content does not infringe another person's rights; and
• Ensuring that User Content does not contain information that you are prohibited from disclosing or storing.

9.5 If you enter information about clients or other individuals, including names, job details or notes, you are responsible for ensuring that you have the legal authority and any necessary consent to provide that information to the App and for its storage and processing as described in our Privacy Policy.

9.6 You should avoid entering sensitive personal information, confidential third-party information or information that is not reasonably necessary for the intended use of the App.

9.7 We do not claim ownership of User Content and do not use it for advertising or unrelated commercial purposes.

10. Acceptable Use

10.1 You may use the App only for lawful purposes and in accordance with these Terms.

10.2 You must not:

• Circumvent subscription requirements, payment restrictions or Pro access controls;
• Copy, reproduce, distribute, resell, sublicense or commercially exploit the App or its features without our written permission;
• Reverse engineer, decompile, disassemble or attempt to obtain the source code of the App, except to the extent such restriction is prohibited by applicable law;
• Interfere with the operation, security or availability of the App or its servers;
• Attempt to access another user's account, User Content or information;
• Introduce malicious software, harmful code or other security threats;
• Use automated systems, bots or scraping tools to access or extract App content beyond ordinary permitted use;
• Use the App to engage in unlawful, fraudulent or infringing activities; or
• Use the App in a manner that could damage our business, systems or reputation or interfere with another user's use of the App.

10.3 We may investigate suspected violations and suspend or restrict access where reasonably necessary to protect the App, its users or our business.

11. Intellectual Property

11.1 The App and all associated intellectual property, including its software, source code, design, layout, graphics, branding, text, original content, calculators, interfaces and compilation of materials, are owned by or licensed to us.

11.2 Except for the limited right to access and use the App in accordance with these Terms, no ownership or intellectual property rights are transferred to you.

11.3 You must not reproduce, distribute, modify, adapt, publish, sell, license or create derivative works from the App or its proprietary materials without our prior written consent.

11.4 Certain formulas, reference data and technical information may be derived from publicly available materials or third-party sources. Relevant sources may be identified on the App's sources and credits page. Nothing in these Terms gives us ownership of third-party materials that we do not own.

11.5 If you provide suggestions, feedback or recommendations concerning the App, you grant us permission to use that feedback without restriction or compensation, provided that this does not transfer ownership of your User Content or confidential information.

12. Availability, Maintenance and Changes

12.1 We will make reasonable efforts to maintain the availability and functionality of the App.

12.2 We do not guarantee that the App will be continuously available, uninterrupted, secure, compatible with every device or free from errors.

12.3 Access may be interrupted or restricted for maintenance, upgrades, security issues, technical problems, hosting failures, third-party service interruptions or circumstances beyond our reasonable control.

12.4 We may modify, improve, replace or discontinue features, provided that we act reasonably and comply with applicable obligations to subscribers.

12.5 If we permanently discontinue the Pro subscription service, we will provide reasonable notice where practicable and refund any prepaid subscription amounts attributable to a period after the service is discontinued, unless otherwise agreed or required by law.

12.6 We are not responsible for interruptions or failures caused by your internet connection, device, operating system, email provider, payment provider or other third-party service outside our reasonable control.

13. Third-Party Services

13.1 The App relies on third-party service providers, including Supabase, Netlify, Stripe, Cloudflare and email delivery providers.

13.2 Your use of certain third-party services may be subject to separate terms and privacy policies.

13.3 We are not responsible for the independent acts, omissions, policies or services of third parties, except to the extent that applicable law makes us responsible.

13.4 We will take reasonable steps to select and manage service providers appropriate to the operation of the App, but cannot guarantee their continuous availability or performance.

14. Disclaimer of Warranties

14.1 To the maximum extent permitted by applicable law, the App and its features are provided on an "as is" and "as available" basis.

14.2 We disclaim warranties, representations and conditions not expressly provided in these Terms, including implied warranties or conditions of merchantability, fitness for a particular purpose, accuracy, availability and non-infringement, to the extent such disclaimers are legally permitted.

14.3 We do not warrant that:

• The App will meet every user's requirements;
• Calculations or results will be accurate or error-free;
• The App will be compatible with every device or operating system;
• Access will be uninterrupted or free from technical issues; or
• Data will never be lost, corrupted or inaccessible.

14.4 Nothing in this section excludes any warranty, condition or statutory protection that cannot legally be excluded under applicable law.

15. Limitation of Liability

15.1 To the maximum extent permitted by applicable law, we will not be liable for indirect, incidental, special, punitive or consequential losses, including loss of profits, revenue, business opportunities, anticipated savings, goodwill or data.

15.2 To the maximum extent permitted by applicable law, we will not be liable for:

• Damage to instruments, materials, tools or equipment arising from reliance on App calculations or results;
• Losses arising from incorrect or incomplete User Content;
• Losses arising from your failure to independently verify calculations or measurements;
• Interruptions or failures of third-party services;
• Unauthorized access resulting from compromised email accounts or devices, except to the extent caused by our failure to meet applicable legal obligations; or
• Losses arising from your failure to maintain independent backups of important information.

15.3 To the maximum extent permitted by applicable law, our total aggregate liability arising out of or relating to the App or these Terms, whether in contract, tort (including negligence) or otherwise, will not exceed the greater of:

• The total amount you paid us for Pro subscriptions during the 12 months immediately preceding the event giving rise to the claim; and
• CA $25.

15.4 The limitations in this section apply regardless of the legal basis of the claim and even if we have been advised of the possibility of the relevant loss.

15.5 Nothing in these Terms excludes or limits liability that cannot legally be excluded or limited, including any mandatory consumer rights, statutory remedies or other non-waivable obligations.

15.6 Nothing in these Terms prevents you from pursuing a remedy available under applicable consumer protection legislation.

16. Indemnification

16.1 To the extent permitted by applicable law, you agree to indemnify and hold harmless the Operator and its owners, employees and service providers from third-party claims, losses, damages and reasonable legal expenses arising directly from:

• Your unlawful use of the App;
• Your infringement of another person's intellectual property or privacy rights;
• Your User Content where you did not have the necessary rights or authority to provide it; or
• Your material breach of these Terms.

16.2 This indemnity does not apply to the extent that a claim arises from our negligence, wilful misconduct, breach of these Terms or violation of applicable law.

16.3 We will provide reasonable notice of any claim for which indemnification is sought and will not settle a claim in a manner that imposes liability or an obligation on you without your consent.

17. Suspension and Termination

17.1 You may stop using the App at any time.

17.2 You may delete your account through Account & Pro > Delete My Account.

17.3 Deleting your account:

• Cancels your subscription;
• Immediately ends access to Pro features;
• Removes your account and associated synced User Content from our active database, subject to permitted retention in backups and records; and
• Does not necessarily delete financial records retained by Stripe or records that we are legally required or permitted to retain.

17.4 We may suspend or terminate your account where reasonably necessary if:

• You materially or repeatedly breach these Terms;
• Your account is involved in fraud or suspected unlawful activity;
• Your conduct creates a security risk or threatens the integrity of the App;
• Your use materially interferes with the App or other users; or
• We are legally required to do so.

17.5 Where reasonably practicable, we will provide notice and an opportunity to address the issue before terminating an account, unless immediate action is necessary for security, legal or operational reasons.

17.6 If we terminate your account without cause, we will provide a refund of any prepaid subscription amount attributable to the unused portion of the subscription period, where appropriate and subject to applicable law.

17.7 Termination does not affect any rights or obligations that accrued before termination.

18. Privacy

18.1 Our collection, use, storage, disclosure and protection of personal information are governed by our Privacy Policy, available at https://luthiersapp.com/privacy.html.

18.2 By using the App, you acknowledge that you have been given an opportunity to review the Privacy Policy.

18.3 The Privacy Policy forms part of the contractual framework governing your use of the App, but does not replace these Terms.

18.4 If there is a conflict between these Terms and the Privacy Policy concerning the collection, use or disclosure of personal information, the Privacy Policy will govern that privacy-related issue. These Terms govern subscription, payment, licensing and general use matters.

19. Electronic Communications and Notices

19.1 You agree that we may communicate with you electronically, including by email or through notices within the App.

19.2 Electronic communications may include account notices, subscription confirmations, renewal notices, cancellation confirmations, service announcements, security notices and changes to these Terms.

19.3 You are responsible for maintaining access to the email address associated with your account and for reviewing communications sent to that address.

19.4 We will not use account administration communications as a substitute for obtaining consent to marketing communications where such consent is required by law.

20. Changes to These Terms

20.1 We may amend these Terms from time to time to reflect changes in the App, our business operations, legal requirements or service offerings.

20.2 We will update the Effective Date and provide notice of material changes by email or through the App before they take effect, where reasonably practicable.

20.3 Where a change materially affects your rights or obligations, we will provide a reasonable opportunity to review the revised Terms and, where required by law, obtain your affirmative acceptance.

20.4 If you do not agree to a material change, you may stop using the App and cancel your subscription before the change takes effect, subject to any applicable rights to refunds or other remedies.

20.5 Changes will not retroactively alter rights or obligations arising before the effective date of the revised Terms, except where required by law or agreed by you.

21. Governing Law and Jurisdiction

21.1 These Terms are governed by the laws of the Province of Nova Scotia and the federal laws of Canada applicable therein, without regard to conflict-of-law principles.

21.2 Subject only to any additional consumer protection rights or jurisdictional rules that apply to you, any competent court in Nova Scotia will have jurisdiction over disputes arising from these Terms or your use of the App.

21.3 If you are a consumer residing outside Nova Scotia, nothing in these Terms deprives you of mandatory protections or rights available under the consumer protection laws of your place of residence. Those rights and protections are in addition to those under these Terms.

21.4 Nothing in this section requires a consumer to bring a claim in Nova Scotia where applicable law gives that consumer the right to pursue the claim elsewhere.

22. General Provisions

22.1 Entire Agreement: These Terms, together with the Privacy Policy and any additional terms expressly incorporated into them, constitute the entire agreement between you and us concerning your use of the App and supersede prior agreements on that subject.

22.2 Severability: If any provision of these Terms is found to be invalid, unlawful or unenforceable, that provision will be severed or limited to the minimum extent necessary, and the remaining provisions will continue in effect.

22.3 Waiver: A failure or delay by us in exercising a right under these Terms does not constitute a waiver of that right.

22.4 Assignment: You may not assign or transfer your rights or obligations under these Terms without our prior written consent. We may assign these Terms in connection with a sale, transfer, reorganization or other disposition of all or part of our business, provided that applicable legal obligations are respected.

22.5 Force Majeure: We are not responsible for delays or failures caused by circumstances beyond our reasonable control, including natural disasters, power or telecommunications failures, cyberattacks, governmental actions, labour disputes, hosting failures or interruptions to third-party services. This provision does not excuse obligations that cannot legally be suspended or excluded.

22.6 No Partnership: These Terms do not create a partnership, joint venture, employment or agency relationship between you and us.

22.7 Survival: Provisions concerning intellectual property, User Content, disclaimers, limitations of liability, indemnification, governing law and any other provisions that by their nature should survive termination will continue to apply following termination.

23. Contact Information

For questions about these Terms, subscriptions, payments or the App, please contact:

DENTREMONT GUITARS
3451 HWY 3, Lower Argyle
Nova Scotia, Canada, B0W 1W0
Email: Support@LuthiersApp.com
Website: https://luthiersapp.com