GRŌ Terms of Service

Effective: April 23, 2026

Last Updated: May 22, 2026

About these terms

These are the terms of service for GRŌ, a strength training app for iOS published as GRŌ Train on the App Store ("GRŌ" or "the app"). They form a contract between you and the operator of GRŌ ("we," "us," or "GRŌ").

We've tried to write these terms the way the rest of the app is written: directly, in plain English, with the substance of what you're agreeing to visible rather than buried. Where standard legal phrases appear in capital letters, that capitalization is intentional — those phrases have settled legal meaning and rewriting them would weaken the protection they provide for both you and us. We've explained what they mean in plain English alongside.

If you have questions, contact us at support@trainwithgro.com. If something here is unclear, we want to know about it.

These terms work alongside the GRŌ Privacy Policy at trainwithgro.com/privacy, which describes how the app handles your data. The two documents are designed to be read together and not to contradict each other.

1. Acceptance of these terms

1.1 What you're agreeing to

By downloading, installing, signing into, or using GRŌ, you agree to these terms. If you're using the app on behalf of a company or other entity, you confirm you have the authority to agree on its behalf.

1.2 If you don't agree

If you don't agree to these terms, don't use the app. You can stop at any time by deleting it from your devices.

1.3 The privacy policy is part of this agreement

By agreeing to these terms, you also acknowledge the GRŌ Privacy Policy (trainwithgro.com/privacy), which describes what data GRŌ handles and how. If anything here conflicts with the privacy policy, the privacy policy controls for matters of data handling and these terms control for everything else.

2. Eligibility

2.1 Age

You must be at least 13 years old to use GRŌ. If you are under the age of legal majority in your jurisdiction, you confirm that a parent or legal guardian has reviewed and agreed to these terms on your behalf.

2.2 Health and capacity

You confirm that you are physically capable of safely engaging in strength training, or that you have consulted a qualified medical or fitness professional about whether strength training is appropriate for you. See Section 8 (Health and fitness disclaimer) for the full disclaimer.

2.3 Geographic availability

GRŌ is available globally through the App Store. Some features (including AI-powered features and certain payment options) may not be available in all jurisdictions due to local law or platform restrictions.

3. Your account

3.1 Sign in with Apple

GRŌ uses Sign in with Apple as its only authentication method. By signing in, you authorize Apple to share your unique Sign in with Apple identifier, and (at your discretion) your name and email address, with GRŌ. See the privacy policy for what we do with this information.

3.2 Account security

You are responsible for:

3.3 One person, one account

GRŌ accounts are intended for individual use. You may not share your account or transfer it to another person.

4. The app, free tier, and GRŌ PRO subscription

4.1 What's included in the free tier

The free tier of GRŌ includes:

4.2 What GRŌ PRO unlocks

A GRŌ PRO subscription unlocks:

(CSV import — including the AI-assisted mapping pass — is free for all users; it is not a PRO feature.)

We may add features to the free tier or PRO tier, or move features between them, as the app evolves. Material changes will be communicated in-app and reflected in an update to these terms.

4.3 Subscription pricing and auto-renewal

GRŌ PRO is offered at the following prices at launch:

Prices in your local currency are determined by Apple's App Store pricing tiers and may differ. Applicable taxes may apply.

Auto-renewal disclosure (required by Apple):

4.4 Free trial

GRŌ PRO may be offered with a free trial period (currently 7 days at launch). If you do not cancel before the end of the trial period, your subscription will automatically convert to a paid subscription at the price you selected. You can cancel at any time during the trial through your Apple ID account settings.

If you've previously used a free trial for GRŌ PRO, you may not be eligible for another one. Apple controls free trial eligibility.

4.5 Managing or canceling your subscription

All subscription management — including viewing your subscription, changing plans, and canceling — happens through your Apple ID account settings:

iOS Settings → [your name] → Subscriptions → GRŌ Train

GRŌ does not process subscription cancellations directly. We do not have access to your Apple ID account settings.

4.6 Refunds

Refunds for GRŌ PRO subscriptions are handled by Apple under Apple's refund policies, not by GRŌ. To request a refund, visit reportaproblem.apple.com or contact Apple Support. We do not have the ability to issue refunds for App Store purchases.

4.7 Price changes

We may change the price of GRŌ PRO from time to time. If we do:

4.8 Apple's role

Your subscription is a transaction between you and Apple. GRŌ receives subscription status information from Apple (active, trial, expired) but does not see, collect, or store your payment details. Apple's terms govern the payment relationship, including refunds, price changes, and billing disputes.

5. The Overload Engine and AI-powered features

GRŌ uses two distinct categories of intelligence to help you train:

  1. The Overload Engine — a rules-based recommendation system that runs entirely on your device. It analyzes your training history (sets, reps, loads, position-within-session, response over time) and recommends what to do on your next set. The Overload Engine is not AI — it applies clearly defined rules calibrated against evidence-based strength-training literature (Helms, Tuchscherer, Schoenfeld, Rippetoe, Wendler) and transmits no data anywhere. The Overload Engine's recommendation surface (the ghost button on each exercise in active workouts) is part of GRŌ PRO; free users see a paywall when they tap the ghost button.

  2. AI-powered features — a small set of features powered by Anthropic's Claude API. Currently this covers the Weekly Digest (GRŌ PRO) and CSV Import Mapping (free for all users). See section 5.3 below.

5.1 The Overload Engine — what it does

The Overload Engine produces the recommendations you see when you tap the ghost button on an exercise during an active workout. These recommendations consider:

All of this runs locally on your device using compiled Swift code. No data leaves your device for Overload Engine suggestions. No AI is involved.

5.2 The Overload Engine — limits

The Overload Engine does NOT account for:

Suggestions from the Overload Engine are inputs to your decision, not your decision. You are the lifter. You assess your readiness, your body, and the load in front of you. If a suggestion seems too aggressive on a given day — because of how you slept, how you feel, or anything else only you know — back off. If it seems too conservative because you have context the engine doesn't, push.

Overload Engine suggestions are not medical advice, not personal training, and not coaching. They are deterministic recommendations based solely on data you have logged in GRŌ.

5.3 AI-powered features (Anthropic Claude API)

Two GRŌ features transmit data to Anthropic's Claude API over HTTPS:

Weekly Digest (GRŌ PRO only). Generates a short narrative summary of your last seven days of training, recovery, and body data. Sends your recent workouts, HealthKit recovery signals, training load, readiness, and any pain-flagging notes. Auto-refreshes once per day; manual refresh capped at 3/day. Free users do not have access; no Weekly Digest data is transmitted for free accounts.

CSV Import Mapping (free for all users). When you import workout history from another app (Hevy, Strong, generic CSV), names that GRŌ's local matcher can't resolve are sent in a single batch to Anthropic for suggested matches or muscle-group inference. Only exercise NAMES are sent — no loads, reps, dates, or other workout details. Rate-limited to one call per user per 24 hours. Imports without unmatched names skip the AI step.

See the Privacy Policy for the complete data-flow description.

5.4 Accuracy of AI features

AI features, like all AI systems, may produce suggestions that are imperfect, inappropriate for a given context, or wrong. We use Anthropic's Claude to give serious lifters useful tools, but we do not guarantee that any specific AI-generated suggestion or mapping will be optimal, safe, or appropriate for your specific situation. AI features gracefully degrade when unavailable — if the AI call fails, the Weekly Digest hides and CSV Import falls back to local keyword-based mapping.

5.5 Disabling AI features

6. Acceptable use

6.1 What you can do

You can use GRŌ for personal, non-commercial training-related purposes consistent with these terms.

6.2 What you cannot do

You agree not to:

6.3 Consequences of violating acceptable use

We may suspend or terminate your access to GRŌ at any time if you violate these terms. See Section 12 (Termination).

7. Intellectual property

7.1 GRŌ's intellectual property

The GRŌ app, including its name, logo, "GRŌ" and "GRŌ Train" branding, "Log the work. Chase what's next." tagline, design language, source code, visual assets, written content, and all related intellectual property, is owned by GRŌ or licensed to GRŌ by third parties. These terms grant you a limited, non-exclusive, non-transferable, revocable license to use the app for your personal use only. No other rights are granted.

7.2 Your training data

You own your training data. The workouts, routines, programs, notes, measurements, and other content you create in GRŌ belong to you.

By using GRŌ, you grant us a limited license to process your data solely as needed to operate the app for you — for example, to display your workouts back to you, sync them across your own Apple devices via your iCloud, calculate metrics, generate Overload Engine recommendations (deterministic, on-device — see section 5.1), and generate AI-powered features when you opt into them (the Weekly Digest for PRO subscribers, or the AI-assisted mapping during CSV import — see section 5.3). We do not use your training data to build behavioral profiles, sell to third parties, or train AI models for our own commercial purposes.

When you delete data, this license to process it ends, except for any retention required for backup, audit, legal compliance, or fraud prevention, which we'll keep to the minimum necessary.

7.3 Feedback you send us

If you send us feedback, suggestions, or ideas about GRŌ, we can use that feedback freely without obligation to you. This is to allow us to improve the app based on what users tell us, without legal complications. You are not obligated to send us feedback.

7.4 Apple's intellectual property

GRŌ uses Apple frameworks (HealthKit, CloudKit, StoreKit, Sign in with Apple, and others) under license from Apple. Apple's terms govern your use of these frameworks. Nothing in these terms transfers any Apple intellectual property rights to you.

8. Health and fitness disclaimer

This section is important. Read it.

8.1 Strength training carries inherent risk

Strength training is physical work performed under load. It carries inherent risks of injury — to muscles, joints, connective tissue, the spine, the cardiovascular system, and other body systems — even when performed with sound technique, sensible programming, and adequate recovery. These risks cannot be fully eliminated by any app, coach, or program.

8.2 GRŌ is a logging and analysis tool, not a medical or coaching service

GRŌ is a tool for logging and analyzing your training. It is not a substitute for in-person coaching, a personal trainer, a physical therapist, a medical professional, or your own informed judgment about your body in the moment.

Specifically, GRŌ does not see, and cannot account for:

8.3 You make the call

You are responsible for your own training decisions. Suggestions from GRŌ — whether the deterministic, on-device Overload Engine recommendations or any AI-generated content from the Weekly Digest — are inputs to your decision, not substitutes for it.

8.4 Consult a professional before significant changes

Before beginning a strength training program, making significant changes to one, or returning to training after an injury or extended layoff, consult a qualified medical or fitness professional. This is especially important if you:

8.5 Stop if something is wrong

If you experience pain, dizziness, chest discomfort, shortness of breath beyond normal exertion, or any other warning sign during training, stop immediately and seek appropriate care. No suggestion in GRŌ overrides what your body is telling you.

9. Disclaimer of warranties and limitation of liability

9.1 The app is provided "AS IS"

THE APP, INCLUDING ALL FEATURES, AI-GENERATED SUGGESTIONS, CONTENT, AND DATA PROVIDED THROUGH THE APP, IS PROVIDED "AS IS" AND "AS AVAILABLE." TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, GRŌ AND ITS OPERATORS, AGENTS, AND LICENSORS DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, AND ANY WARRANTIES ARISING OUT OF COURSE OF DEALING OR USAGE OF TRADE.

In plain English: We make GRŌ as carefully as we can, but we don't promise it will be uninterrupted, error-free, or that it will work for every user's specific goals or in every situation. We don't promise the Overload Engine's suggestions will be optimal for any specific lifter on any specific day. We don't promise the app will be compatible with every device, iOS version, or future update. Use of the app is at your own risk.

9.2 Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT WILL GRŌ, ITS OPERATORS, AGENTS, OR LICENSORS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF PROFITS, REVENUE, DATA, USE, GOODWILL, BUSINESS OPPORTUNITY, OR OTHER INTANGIBLE LOSSES, ARISING OUT OF OR RELATING TO YOUR USE OF OR INABILITY TO USE THE APP, REGARDLESS OF THE LEGAL THEORY (CONTRACT, TORT, STRICT LIABILITY, OR OTHERWISE) AND EVEN IF GRŌ HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

GRŌ'S TOTAL CUMULATIVE LIABILITY FOR ANY CLAIM ARISING OUT OF OR RELATING TO THESE TERMS OR YOUR USE OF THE APP, REGARDLESS OF THE FORM OF ACTION, WILL NOT EXCEED THE GREATER OF (A) ONE HUNDRED U.S. DOLLARS ($100), OR (B) THE TOTAL AMOUNT YOU PAID FOR GRŌ PRO THROUGH APPLE IN THE TWELVE (12) MONTHS PRECEDING THE EVENT GIVING RISE TO THE CLAIM.

In plain English: Even in the worst case where something goes wrong with the app and we're at fault, the most we can be required to pay you is $100, or the amount you paid us through Apple in the past year, whichever is more. We're a small operation; this is the only way an app like ours can exist.

9.3 Some jurisdictions

Some jurisdictions do not allow the exclusion or limitation of certain warranties or damages. In those jurisdictions, the exclusions and limitations above apply only to the extent permitted by local law, and your statutory rights as a consumer are unaffected.

9.4 Indemnification

To the maximum extent permitted by law, you agree to defend, indemnify, and hold harmless GRŌ and its operators, agents, and licensors from and against any claims, damages, liabilities, costs, and expenses (including reasonable attorneys' fees) arising out of or relating to:

In plain English: If your use of the app in a way that breaks these terms causes us to get sued or otherwise face costs, you agree to cover those costs. This is standard for consumer apps and is here to protect against bad-faith use.

10. Dispute resolution and arbitration

Read this section carefully. It affects how disputes between you and GRŌ are resolved.

10.1 What you're agreeing to in this section

In short:

10.2 Informal resolution first

Before filing arbitration, you agree to contact us at support@trainwithgro.com and describe the dispute in good faith. We'll work in good faith to resolve it within 60 days of receiving your notice. Many disputes can be resolved this way; please try it first.

10.3 Binding individual arbitration

If informal resolution doesn't work, you and GRŌ agree to resolve any dispute arising out of or relating to these terms or the app through binding individual arbitration administered by the American Arbitration Association (AAA) under its Consumer Arbitration Rules, available at adr.org.

The arbitration will be conducted by a single arbitrator. It will take place in Maryland, in your home state if you prefer, or by phone or videoconference where the AAA's rules permit.

The arbitrator's decision is final and binding, and judgment on the arbitrator's decision can be entered in any court of competent jurisdiction.

10.4 Class action waiver

YOU AND GRŌ EACH WAIVE THE RIGHT TO PARTICIPATE IN A CLASS ACTION, COLLECTIVE ACTION, REPRESENTATIVE ACTION, OR PRIVATE ATTORNEY GENERAL ACTION OF ANY KIND. ARBITRATION UNDER THESE TERMS WILL BE CONDUCTED ON AN INDIVIDUAL BASIS ONLY — NOT ON A CLASS, CONSOLIDATED, OR REPRESENTATIVE BASIS.

If a court determines that this class action waiver is unenforceable in a specific case, the entire arbitration agreement (Sections 10.3 and 10.4) is severable and that case will proceed in court instead.

10.5 Small claims court exception

You may bring an individual claim against GRŌ in small claims court instead of arbitration if your claim qualifies under that court's rules and is brought only on an individual basis.

10.6 Your right to opt out of arbitration

You can opt out of this arbitration agreement (Sections 10.3 and 10.4) within 30 days of first accepting these terms by emailing us:

Opting out only affects Sections 10.3 and 10.4 (arbitration and the class action waiver). All other parts of these terms continue to apply.

10.7 Costs and fees

The AAA's Consumer Arbitration Rules govern fees, including any cost limits for consumer claimants. Each party generally pays its own attorney's fees and costs unless the arbitrator orders otherwise under applicable law.

11. Governing law

These terms are governed by the laws of the State of Maryland, USA, without regard to its conflict-of-laws principles. For any dispute that is not subject to arbitration (for example, small claims court actions or matters where arbitration is found unenforceable), you and GRŌ agree to the exclusive jurisdiction of the state and federal courts located in Maryland.

This choice of governing law does not deprive you of any consumer protection rights guaranteed by the laws of your country, state, or province of residence that cannot be waived by contract.

12. Termination

12.1 Termination by you

You can stop using GRŌ at any time. To fully disassociate from the app:

  1. Cancel any active GRŌ PRO subscription through your Apple ID account settings
  2. Delete the app from your devices
  3. Remove GRŌ data from iCloud via iOS Settings → [your name] → iCloud → Manage Account Storage
  4. Revoke Sign in with Apple access via iOS Settings → [your name] → Sign in with Apple → GRŌ Train → Stop using Apple ID

12.2 Termination by us

We may suspend or terminate your access to GRŌ at any time if:

In most cases we'll give you reasonable notice before suspending or terminating, except where doing so would not be possible (for example, in cases of legal requirement or active misuse).

12.3 Effect of termination

When your access ends:

13. Future features and how these terms will evolve

GRŌ is in active development. As the app grows, new features will introduce new contract considerations. We're naming these now so you know what to expect, in the same spirit as the privacy policy's section on planned data categories. When any of these become active, these terms will be updated and we'll notify you in the app before material changes take effect.

13.1 Cardio and outdoor tracking

A future version of GRŌ is expected to include cardio support, including potentially outdoor activities (running, cycling). When that ships:

13.2 Community features

GRŌ has a Community tab that is currently nascent. Future Community features may include activity feeds, comments, friend connections, direct messaging, shared workouts, and other social features. When those ship, these terms will be updated to add:

If you don't engage with Community features, those sections will not affect you.

13.3 Recording features

Planned future features may let you record progress photos, form videos, or voice notes. When those ship, these terms will be updated to address:

13.4 GRŌ-controlled servers

Most of today's GRŌ functionality is local-first or uses your iCloud. Future Community features will require GRŌ-controlled servers. When that infrastructure is deployed, these terms will be updated to reflect:

13.5 Paid advertising and acquisition

The privacy policy describes our plans to run paid acquisition campaigns using privacy-preserving attribution. These terms may be updated if those campaigns introduce contract-relevant elements (referral programs, promotional codes, partner promotions, etc.).

13.6 How these changes will be communicated

Material changes to these terms — adding new sections that affect your rights, changing how disputes are resolved, modifying liability, expanding the scope of acceptable use — will be communicated through an in-app notification before taking effect. Continued use of the app after notification constitutes acceptance of the updated terms. If you don't accept a change, you can stop using the app and delete your data per Section 12.1.

14. Changes to these terms

We may update these terms when GRŌ's features, business model, or legal context changes. When we make changes:

Continued use of GRŌ after a material change has taken effect, following notification, constitutes acceptance of the updated terms. If you don't accept a change, see Section 12.1 for how to discontinue use.

15. Apple-specific provisions

These provisions are required by Apple's App Store agreement and apply to your use of GRŌ on Apple devices.

15.1 Acknowledgment

You and GRŌ acknowledge that these terms are between you and GRŌ only, and not with Apple. GRŌ — not Apple — is solely responsible for the app and its content.

15.2 Scope of license

The license granted in these terms is limited to a non-transferable license to use the app on any Apple-branded device that you own or control, as permitted by the App Store Terms of Service.

15.3 Maintenance and support

GRŌ is solely responsible for providing any maintenance and support for the app. Apple has no obligation to provide maintenance or support services for the app.

15.4 Warranty

GRŌ is solely responsible for any product warranties, whether express or implied by law, to the extent not effectively disclaimed. In the event of a failure of the app 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.

15.5 Product claims

GRŌ — not Apple — is responsible for addressing any claims relating to the app or your use of it, including (a) product liability claims, (b) any claim that the app fails to conform to any applicable legal or regulatory requirement, and (c) claims arising under consumer protection or similar legislation.

15.6 Intellectual property claims

In the event of any third-party claim that the app or your use of it infringes that third party's intellectual property rights, GRŌ — not Apple — will be solely responsible for the investigation, defense, settlement, and discharge of any such claim, to the extent required by these terms.

15.7 Legal compliance

You represent and warrant that (a) 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 (b) you are not listed on any U.S. Government list of prohibited or restricted parties.

15.8 Apple as third-party beneficiary

You and GRŌ acknowledge and agree that Apple, and Apple's subsidiaries, are third-party beneficiaries of these terms, and that, upon your acceptance of these terms, Apple will have the right (and will be deemed to have accepted the right) to enforce these terms against you as a third-party beneficiary.

16. General provisions

16.1 Severability

If any provision of these terms is found to be unenforceable or invalid by a court of competent jurisdiction or arbitrator, the remaining provisions remain in full force and effect, and the unenforceable provision will be interpreted (or replaced) to most closely reflect the original intent within the limits of applicable law.

16.2 No waiver

Our failure to enforce any provision of these terms is not a waiver of that provision or of our right to enforce it later.

16.3 Assignment

You may not assign or transfer these terms or any rights under them without our prior written consent. We may assign these terms to a successor in connection with a merger, acquisition, sale of assets, or similar transaction, with notice to you.

16.4 Entire agreement

These terms, together with the GRŌ Privacy Policy, are the entire agreement between you and GRŌ regarding the app and supersede any prior agreements between you and GRŌ on this subject.

16.5 Force majeure

Neither party is liable for failure to perform under these terms (other than payment obligations) due to causes beyond reasonable control, including natural disasters, war, terrorism, civil disturbance, government action, labor disputes, internet or platform outages, or pandemics.

16.6 No agency

Nothing in these terms creates a partnership, joint venture, employment, agency, or franchise relationship between you and GRŌ.

16.7 Headings

Section headings are for convenience only and don't affect interpretation.

17. Contact

If you have questions about these terms or need to reach us:

General support: support@trainwithgro.com

Privacy inquiries: privacy@trainwithgro.com

Legal notices (including arbitration opt-out, formal disputes, DMCA when applicable): support@trainwithgro.com with the relevant subject line

We aim to respond to inquiries within 7 business days.

Quick reference — what these terms mean in plain English

The deal:

The honest disclaimers:

The legal protections:

What changes over time:

If you don't agree with something:

GRŌ is built by a small independent team. These terms describe the actual deal between you and us as of the effective date. If you find something here that doesn't match how the app actually works, please contact us at support@trainwithgro.com so we can fix it.