Terms of Service

By creating an account, downloading, or using StrengthSync ("SS", "the app", "the service"), you agree to these Terms of Service ("Terms") and to our Privacy Policy. If you do not agree, do not use the app.

You must be at least 18 years old to use SS. If you are under the age of majority in your jurisdiction, you confirm that a parent or legal guardian has reviewed and accepted these Terms on your behalf.

Continued use of the app after we post updated Terms constitutes acceptance of the updated Terms. Material changes will trigger an in-app re-consent prompt on next authenticated app open.

StrengthSync is a fitness and wellness application that allows you to log workouts, cardio sessions, nutrition, and personal health metrics; calculate physiology estimates (such as BMR, TDEE, EER, VO2 max, HRmax, and macro targets); and interact with AI-assisted features such as the coach chat and food parser. The service is provided "as is" and "as available" without warranty of any kind (see Section 13).

StrengthSync is not a medical device, is not a HIPAA covered entity, is not a substitute for evaluation, diagnosis, or treatment by a qualified healthcare professional, and does not provide medical advice. See Section 9 (Health & Medical Disclaimer).

Subject to your compliance with these Terms, StrengthSync grants you a personal, limited, non-exclusive, non-transferable, non-sublicensable, revocable license to download, install, and use the app on devices that you own or control, solely for your own personal, non-commercial use.

This license does not give you any right to (a) resell, redistribute, or sublicense the app or any portion of it; (b) reverse engineer, decompile, disassemble, or attempt to derive the source code; (c) modify, adapt, translate, or create derivative works; (d) remove, obscure, or alter any copyright, trademark, or other proprietary notices; or (e) use the app in any way that violates these Terms or applicable law.

You are responsible for maintaining the confidentiality and security of your account credentials and for all activity that occurs under your account. You must provide accurate, current, and complete information when creating your account and keep that information up to date.

• Minimum age: 18. Account creation requires affirmative confirmation, at signup, that you are at least 18 years old. Providing false age information is a material breach of these Terms (see Section 17). If we learn that we have collected information from a user under 18, we will delete that account and the associated data.
• One account per person. Sharing accounts, or operating multiple accounts to evade limits, founding-cohort caps, or trial mechanics, is not permitted.
• Notify us promptly at support@strengthsync.net if you suspect unauthorized access to your account.

You agree not to:

• Use the service for any unlawful, fraudulent, or harmful purpose.
• Attempt to gain unauthorized access to other users' accounts, data, or any portion of our infrastructure.
• Interfere with, disrupt, or place undue load on the service or related networks.
• Use automated tools, bots, scrapers, or other means to access, collect, or extract data from the service.
• Reverse engineer, decompile, or disassemble any part of the app.
• Circumvent, disable, or otherwise interfere with security features, paywalls, rate limits, or usage controls.
• Create accounts by automated means or under false pretenses; impersonate any person or entity.
• Upload, transmit, or introduce viruses, malware, or any other harmful or malicious code.
• Harass, abuse, threaten, or otherwise harm other users, including in any coach-bridge or roster feature where users may interact.
• Use the follow, profile, or social-graph features (including any roster or coach-bridge feature) to harass, threaten, impersonate, or build profiles of other users for any purpose outside ordinary social interaction within the app.
• Create a profile using the real name, image, or likeness of another person without that person's consent, or otherwise impersonate any person or entity.
• Circumvent privacy-tier settings, blocking decisions, or other user-set restrictions, or attempt to view content that another user has restricted.
• Use StrengthSync to provide medical advice, diagnose any condition, or make treatment decisions for yourself or any third party.
• Use the service to violate any applicable law, regulation, or third-party right.

We reserve the right to investigate suspected violations and to take appropriate action, including suspension or termination of accounts (see Section 17).

StrengthSync and all related software, content, designs, logos, trademarks, service marks, copy, citation-verified physiology cards, algorithms, and the "StrengthSync" name are owned by us or our licensors and are protected by United States and international intellectual property laws. Nothing in these Terms transfers any ownership rights to you.

You retain ownership of the data you enter into SS (your body profile, workouts, nutrition entries, health metrics, coach chat messages, and similar content — collectively, "Your Content"). By submitting Your Content to the service, you grant StrengthSync a limited, non-exclusive, worldwide, royalty-free license to host, store, process, transmit, display, and analyze Your Content solely for the purpose of providing and improving the service for you. This license ends when you delete Your Content or your account, subject to the retention and backup rotation described in our Privacy Policy.

If you submit feedback, suggestions, or ideas to us, you grant us a perpetual, irrevocable, royalty-free license to use that feedback without obligation to you.

StrengthSync offers paid subscriptions and may offer one-time purchases. All purchases are processed by Apple via the App Store using your Apple ID. Subscription state is managed by RevenueCat on our behalf. StrengthSync never sees or stores your payment card information.

• Auto-renewal. Subscriptions automatically renew at the end of each billing period at the then-current price unless canceled at least 24 hours before the end of the current period.
• Managing & canceling. Manage or cancel your subscription in iOS Settings → Apple ID → Subscriptions, or via the Subscriptions section of the App Store app. Canceling stops future renewals; access continues through the end of the current paid period.
• Refunds. All refunds for App Store purchases are handled by Apple in accordance with Apple's refund policy (support.apple.com/HT204084). StrengthSync does not issue direct refunds for App Store purchases.
• Free trials. Where offered, free trials convert automatically to a paid subscription at the end of the trial unless canceled before the trial ends. Only one free trial per Apple ID.
• Founding Member terms. Founding Member pricing is a lifetime price-lock tied to your StrengthSync account, contingent on continuous active subscription. The price-lock is not transferable to another person or Apple ID. If you allow your subscription to lapse, the Founding Member price is forfeited and any future resubscription will be at the then-current price.
• Price changes. Prices for new subscriptions may change at any time. Existing subscribers will be notified in advance per Apple's subscription change rules, and price increases require affirmative consent before renewal at the new price.
• App Store is the only paid path. Premium features are licensed only through purchases completed via the App Store using your Apple ID. Any access to premium features granted by any non-App-Store path (including any browser, preview, or other surface that may inadvertently expose premium features) is not a valid license and may be revoked at any time without notice. If you believe you have purchased premium access through any path other than the App Store, contact support@strengthsync.net — such a purchase was not validly issued, no enforceable entitlement is created, and you may be entitled to a refund through the original payment processor.

You retain ownership of the data you enter into StrengthSync. We do not claim intellectual property rights over Your Content beyond the limited operational license described in Section 6. For details on what we collect, how we use it, who we share it with, how long we keep it, and how to delete it, see our Privacy Policy.

StrengthSync provides fitness tracking, nutrition logging, and physiology estimates (including but not limited to BMR, TDEE, EER, VO2 max, HRmax, lactate threshold estimates, body composition estimates, and macronutrient targets) for informational and educational purposes only. These outputs are estimates, not diagnoses, and they are not medical advice.

StrengthSync does not interpret your medications, family history, or any other health information as medical advice. Fields collecting family-history or medication context are used only to refine general fitness calculations and are not a clinical assessment.

You should consult a licensed physician or other qualified healthcare professional before starting, modifying, or stopping any exercise program, diet, supplement, or medication based on information presented in the app. If you are pregnant, have a chronic medical condition, take prescription medications, or have any reason to believe exercise or dietary changes may be unsafe for you, do not use the app to guide those changes without medical supervision.

To the maximum extent permitted by law, StrengthSync, its owners, employees, contractors, and affiliates are not liable for any injury, illness, adverse health outcome, or other harm that may result from your use of the app or any information provided by the app.

Assumption of risk. You acknowledge that exercise, weight training, cardio testing, fasting, dietary changes, and other activities the app may inform or suggest inherently involve risk of injury, illness, or other harm — including but not limited to musculoskeletal injury, cardiovascular events, hypoglycemic episodes, and adverse interactions with medications or pre-existing conditions. You voluntarily assume all such risk arising from your use of the app or any activity undertaken in reliance on the app's outputs. You confirm that you have evaluated your own physical readiness — or consulted a qualified healthcare professional — before relying on any output from the app to guide a physical activity, training load, dietary change, fasting protocol, or supplement decision.

Waiver of claims. To the maximum extent permitted by applicable law, you waive any and all claims against StrengthSync arising from physical injury, illness, or other harm sustained while using or in reliance on the app, except where such harm is caused by StrengthSync's gross negligence or willful misconduct. This waiver is in addition to, and not in place of, the disclaimers in Section 13 and the limitations in Section 14. Some jurisdictions do not permit the waiver of certain claims; in those jurisdictions, this waiver applies only to the maximum extent permitted by law.

StrengthSync integrates with third-party services to provide its functionality, including Apple StoreKit, Apple HealthKit, RevenueCat, Anthropic, Groq, Supabase, Vercel, Upstash, PostHog, USDA FoodData Central, and Open Food Facts. By using the app you accept that the relevant subset of your data flows to these providers as described in our Privacy Policy. Your use of those services may also be subject to the third party's own terms and privacy policy.

If you use the Coach Bridge feature — either as an athlete who accepts a coach invitation, or as a coach who invites athletes through Periodize — the following additional terms apply.

For athletes:

• Accepting a coach invitation grants the inviting coach read-only access to the subset of your data described in our Privacy Policy, Section 11, governed by the consent scope you accept at invite time.
• You may leave a coach's roster at any time from in-app settings; this ends future data flow to that coach. Data the coach has already viewed cannot be recalled.
• StrengthSync facilitates the technical relationship between you and your coach but is not a party to that relationship and does not vet, certify, license, supervise, or take responsibility for any coach's qualifications, programming, advice, or conduct. Selecting and engaging a coach is your own decision.
• Disputes between you and your coach (including disputes about coaching outcomes, fees paid outside the app, or coach conduct) are between you and your coach. StrengthSync will not mediate such disputes but will, on request, terminate the data-sharing link.

For coaches:

• You agree to use athlete data accessed through Coach Bridge or Periodize only for the purpose of coaching the athlete who granted you access, and never for marketing to that athlete outside the coaching relationship, resale, transfer, or any purpose the athlete did not consent to.
• You agree to use Coach Bridge and Periodize features in compliance with all applicable laws, including any professional-licensing, scope-of-practice, or coaching-certification rules in your jurisdiction. You are solely responsible for confirming that your use of these features is lawful where you operate.
• You may not retain copies of athlete data after the athlete has revoked your access, except where retention is required by law or reasonably needed for resolution of a specific dispute then-pending.
• You are solely responsible for the coaching services you provide. StrengthSync makes no warranty as to any outcome of coaching delivered through Coach Bridge or Periodize, and is not liable for the conduct, advice, programming, or services of any coach using the platform.
• StrengthSync may suspend or terminate your access to Coach Bridge or Periodize, with or without notice, if we reasonably believe you have violated this Section, the Acceptable Use rules in Section 5, applicable law, or the rights of any athlete.

We strive to keep StrengthSync available at all times, but we do not guarantee uninterrupted, error-free, or secure access. We may modify, suspend, or discontinue any part of the service at any time, with or without notice, and we are not liable to you or any third party for doing so.

To the maximum extent permitted by applicable law, StrengthSync is provided "as is" and "as available", with all faults and without warranty of any kind. We disclaim all warranties, whether express, implied, statutory, or otherwise, including without limitation any implied warranties of merchantability, fitness for a particular purpose, title, non-infringement, accuracy, completeness, reliability, or that the app will meet your requirements, operate without interruption, or be free of viruses or other harmful components.

Without limiting the foregoing, we make no warranty that any physiology calculation, recommendation, AI-generated response, or other output of the app is accurate, complete, current, or appropriate for your individual circumstances.

To the maximum extent permitted by applicable law, in no event will StrengthSync, its owners, employees, contractors, affiliates, or licensors be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, including without limitation loss of profits, revenue, data, goodwill, or other intangible losses, arising out of or related to your use of (or inability to use) the service, even if we have been advised of the possibility of such damages.

To the maximum extent permitted by applicable law, our total aggregate liability to you for all claims arising out of or related to the service or these Terms is limited to the greater of (a) one hundred U.S. dollars ($100) or (b) the total amount you paid to StrengthSync (through the App Store) in the twelve (12) months immediately preceding the event giving rise to the claim.

Some jurisdictions do not allow the exclusion or limitation of certain damages, so some of the above limitations may not apply to you. In such jurisdictions, our liability is limited to the maximum extent permitted by law.

You agree to defend, indemnify, and hold harmless StrengthSync, its owners, employees, contractors, affiliates, and licensors from and against any claims, liabilities, damages, losses, and expenses (including reasonable attorneys' fees) arising out of or in any way connected with (a) your access to or use of the service, (b) your violation of these Terms, (c) Your Content, or (d) your violation of any law or any right of any third party. We reserve the right to assume the exclusive defense and control of any matter otherwise subject to indemnification, in which case you agree to cooperate with our defense.

Governing law. These Terms and any dispute arising out of or related to them or to your use of the service are governed by the laws of the State of Alabama, United States, without regard to its conflict-of-laws principles. The United Nations Convention on Contracts for the International Sale of Goods does not apply.

Informal resolution first. Before filing a claim, you agree to first contact us at legal@strengthsync.net and attempt to resolve the dispute informally. We will likewise contact you at the email associated with your account. If the dispute is not resolved within thirty (30) days after notice, either party may proceed under the arbitration provision below.

Binding arbitration. You and StrengthSync agree that any dispute, claim, or controversy arising out of or relating to these Terms or your use of the service will be resolved by binding individual arbitration administered by the American Arbitration Association (AAA) under its Consumer Arbitration Rules. The arbitration will be conducted by a single arbitrator, in English, and the seat of arbitration will be in the State of Alabama. Judgment on the award may be entered in any court of competent jurisdiction.

Class-action waiver. You and StrengthSync each agree that any dispute will be brought in an individual capacity only, and not as a plaintiff or class member in any purported class, consolidated, or representative proceeding. The arbitrator may not consolidate the claims of more than one person and may not preside over any form of representative or class proceeding.

Carve-outs. Notwithstanding the foregoing, either party may (a) bring an individual claim in small-claims court in the State of Alabama for any dispute within that court's jurisdiction, and (b) seek injunctive or other equitable relief in a court of competent jurisdiction to protect intellectual property rights or prevent unauthorized access to the service.

30-day opt-out. You may opt out of the arbitration agreement in this Section 16 by sending written notice to legal@strengthsync.net within thirty (30) days of first accepting these Terms. The notice must state your full name, the email address associated with your account, and a clear statement that you opt out of arbitration.

Venue for non-arbitrable matters. For any dispute not subject to arbitration, you and StrengthSync consent to the exclusive jurisdiction and venue of the state and federal courts located in the State of Alabama.

You may delete your account and end your use of the service at any time from inside the app (Settings → Account → Delete Account) or by emailing support@strengthsync.net. Deletion is governed by the retention and backup rotation in our Privacy Policy.

We may suspend or terminate your account and access to the service at any time, with or without notice, if we reasonably believe you have violated these Terms, applicable law, or the rights of others, or if your account creates risk or possible legal exposure for us or other users.

Upon termination: (a) the licenses granted to you under Section 3 end immediately; (b) any paid subscription continues only through the end of the then-current billing period and will not renew; (c) Founding Member price-lock status is forfeited (i) if your subscription is terminated for material violation of these Terms, or (ii) if your subscription lapses as described in Section 7; (d) Sections that by their nature should survive termination (including Sections 6, 8, 9, 11 (coach data-use and post-revocation obligations), 13, 14, 15, 16, 18, and 19) will survive.

We may update these Terms from time to time. When we do, we will update the "Last updated" date at the top of this page and bump the internal Terms version. Material changes will trigger an in-app re-consent prompt on your next authenticated app open. Continued use of the service after a change constitutes acceptance of the updated Terms.

If any provision of these Terms is held to be invalid, illegal, or unenforceable, the remaining provisions will continue in full force and effect, and the invalid provision will be modified to the minimum extent necessary to make it enforceable while preserving the parties' intent.

These Terms, together with the Privacy Policy, the App Store Terms of Service, and any other notices or supplemental terms presented in the app, constitute the entire agreement between you and StrengthSync regarding the service and supersede any prior agreements on the same subject matter.

Our failure to enforce any provision is not a waiver of that provision. You may not assign or transfer these Terms without our prior written consent; we may assign these Terms at any time without notice or consent.

General questions: support@strengthsync.net

Privacy questions: privacy@strengthsync.net

Legal notices, arbitration opt-out, indemnification correspondence: legal@strengthsync.net