The short version: Palaistra is a coaching tool, not a medical device or a substitute for professional instruction. Use common sense — listen to your body, not just the AI. We provide the technology; you are responsible for training safely.
1. Acceptance of Terms
By accessing, downloading, installing, or using the Palaistra application and related services (collectively, the "Service"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree to all of these Terms, do not use the Service.
These Terms constitute a legally binding agreement between you and Palaistra ("we," "us," "our"). We may update these Terms from time to time. We will notify you of material changes via the app or email. Your continued use of the Service after any changes constitutes acceptance of the updated Terms.
2. Service Description
Palaistra is an AI-powered athletic coaching application that provides:
Real-time movement analysis — using computer vision and pose estimation to analyze your form during practice
Voice coaching — AI-generated conversational coaching feedback powered by large language models
Visual form analysis — multimodal AI analysis of your athletic technique from camera frames
Instant replay — skeleton-based replay of your movements with coaching overlays
Drills and curriculum — structured training plans and guided practice exercises
Video upload analysis — analysis of pre-recorded video footage
The Service currently supports tennis, pickleball, golf, and weightlifting, with additional sports planned. Available features vary by subscription tier.
3. User Accounts
3.1 Registration
To access the full Service, you must create an account by providing a valid email address. We use passwordless authentication (magic links) — a sign-in link is sent to your email each time you log in.
3.2 Eligibility
You must be at least 13 years of age to use the Service. If you are between 13 and 18 years of age, you must have parental or guardian consent. By using the Service, you represent that you meet these requirements.
3.3 Account Responsibilities
You are responsible for maintaining the security of your email account, which controls access to your Palaistra account
One account per person — do not share your account with others
You agree to provide accurate information during registration and to keep your profile information current
You are responsible for all activity that occurs under your account
Notify us immediately at support@palaistra.ai if you suspect unauthorized access to your account
4. Subscription Plans and Billing
4.1 Free Tier
Palaistra offers a free tier with the following limitations:
10 movements analyzed per session
2 coaching observations per session
1 session per calendar month
Limited AI visual analysis (quality scoring only)
No improvement tracking, replay, drills, or coaching memory
4.2 Free Trial
New users may be eligible for a 7-day free trial of the full Service. The trial provides unlimited access to all features. Each user is eligible for one trial. After the trial period, your account will revert to the Free tier unless you subscribe to a paid plan.
4.3 Paid Plans
We offer the following paid subscription tiers:
Tier
Features
Starter
Unlimited sessions, movements, and voice coaching. Improvement tracking, instant replay, drills, and curriculum
Pro
Everything in Starter, plus full Gemini visual analysis, extended coaching memory, Coach's Eye ghost overlay, rally/tactical analysis, and video uploads
Elite
Everything in Pro, plus unlimited coaching memory, side-by-side comparison, video export, extended rally analysis, unlimited video uploads, and priority support
Current pricing is displayed within the app and on our website. Prices are in US dollars and are subject to change with at least 30 days' notice.
4.4 Billing Terms
Payment methods: Subscriptions can be purchased via Stripe (web) or Apple In-App Purchase (iOS). Payment is processed by the respective provider
Auto-renewal: Subscriptions automatically renew at the end of each billing period (monthly or annual) unless cancelled at least 24 hours before the renewal date
Cancellation: You can cancel your subscription at any time. For Stripe subscriptions, use the billing portal accessible from the app's Settings screen. For Apple subscriptions, manage them through your Apple ID settings. Cancellation takes effect at the end of the current billing period — you retain access until then
Refunds: Refund requests are handled on a case-by-case basis in accordance with applicable law. For Stripe-billed subscriptions, contact support@palaistra.ai. For Apple-billed subscriptions, request a refund through Apple
Price changes: We may change subscription prices with at least 30 days' advance notice. Price changes will not affect the current billing period
Taxes: Prices may be exclusive of applicable taxes, which will be calculated and added at checkout based on your location
5. Acceptable Use
You agree to use the Service responsibly. Specifically, you agree not to:
Use the Service for any unlawful or unauthorized purpose
Attempt to reverse engineer, decompile, disassemble, or extract source code from the application
Interfere with or disrupt the Service's infrastructure, servers, or networks
Circumvent or attempt to circumvent subscription tier restrictions, free tier limits, or rate limits
Use automated tools, bots, scrapers, or similar technology to access the Service
Record, redistribute, or commercially exploit coaching content generated by the Service
Impersonate another user or misrepresent your identity
Transmit any malicious code, viruses, or harmful content through the Service
Use the Service in a manner that could damage, disable, or impair the Service for other users
Attempt to gain unauthorized access to any part of the Service, other accounts, or connected systems
Violation of these terms may result in suspension or termination of your account.
6. AI Coaching Disclaimer
Palaistra is a technology-assisted coaching tool. It is not a medical device, a licensed professional sports coach, a certified personal trainer, or a substitute for professional medical or sports advice.
AI limitations: Coaching feedback is generated by machine learning models (including OpenAI's GPT and Google's Gemini) and may contain errors, inaccuracies, or inappropriate suggestions. AI models can hallucinate, misinterpret movements, or provide advice that is not suitable for your specific situation
Not medical advice: The Service is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before beginning a new exercise program, if you experience pain or injury, or if you have any medical conditions that may affect your ability to exercise safely
Not a replacement for professional coaching: While Palaistra provides data-driven feedback, it cannot replicate the full judgment, experience, and situational awareness of a qualified human coach. We recommend using Palaistra to supplement, not replace, professional instruction
Pose estimation limitations: Biomechanical analysis is based on 2D and 3D pose estimation, which has inherent technical limitations. Camera angle, lighting conditions, clothing, and body occlusion can all affect accuracy
Skill assessments are estimates: Skill level assessments (NTRP ratings, DUPR estimates, golf handicap estimates) are approximations based on AI analysis and may not reflect official or certified ratings
Your responsibility: You are solely responsible for your physical safety during any training activity. Use your own judgment about your fitness, capabilities, and physical condition at all times
7. Safety Warnings
7.1 General Safety
Stop exercising immediately if you experience pain, dizziness, shortness of breath, nausea, or any unusual discomfort
Warm up properly before each session and cool down afterward
Ensure you have adequate space and a safe training environment
Stay hydrated and take breaks as needed
The app's coaching suggestions should supplement, not override, your own judgment about your body
7.2 Sport-Specific Warnings
Weightlifting: The app may detect some form issues (e.g., lower back rounding, knee valgus, incomplete depth), but it cannot guarantee detection of all potentially dangerous movement patterns. Always use appropriate safety equipment such as squat racks, spotter arms, and collars. Never lift heavy loads without a human spotter or proper safety equipment. Train within your known capabilities.
Tennis and Pickleball: Repetitive overhead motions (especially serves and overhead smashes) can stress the shoulder, elbow, and wrist. If the AI suggests technique changes, implement them gradually. Do not dramatically alter your mechanics mid-session based on a single coaching suggestion.
Golf: Rotational sports involve significant spinal loading. If you have a history of back problems, consult a physician or physical therapist before implementing technique changes suggested by the app.
8. Intellectual Property
8.1 Our Intellectual Property
The Service, including its software, code, design, user interface, coaching algorithms, training content, coaching decision trees, and branding, is owned by Palaistra and is protected by copyright, trademark, and other intellectual property laws. The Palaistra name, logo, and related marks are our trademarks. You may not use them without our written permission.
8.2 Your Data
Your session data, performance metrics, coaching history, and profile information belong to you. We do not claim ownership of your personal data.
8.3 License to Process
By using the Service, you grant us a limited, non-exclusive, revocable license to process your session data, video frames (temporarily), and profile information solely for the purpose of providing and improving the coaching service. This license terminates when you delete your account.
8.4 Feedback
If you provide feedback, suggestions, or ideas about the Service, we may use them to improve the Service without obligation or compensation to you.
9. Disclaimers
To the maximum extent permitted by applicable law:
The Service is provided "as is" and "as available" without warranties of any kind, whether express, implied, or statutory
We disclaim all implied warranties, including warranties of merchantability, fitness for a particular purpose, and non-infringement
We do not warrant that the Service will be uninterrupted, error-free, or free of harmful components
We do not guarantee the accuracy, completeness, reliability, or usefulness of any coaching feedback, biomechanical analysis, or skill assessment
We do not warrant that AI-generated coaching advice will be appropriate for your specific physical condition, fitness level, or goals
10. Limitation of Liability
To the maximum extent permitted by applicable law:
No liability for injuries: We are not liable for any physical injuries, aggravation of existing conditions, or health consequences that may result from your use of the Service or reliance on its coaching feedback
Monetary cap: Our total aggregate liability for any claims arising from your use of the Service shall not exceed the total amount you have paid to us in the twelve (12) months immediately preceding the event giving rise to the claim, or fifty US dollars ($50), whichever is greater
No indirect damages: We are not liable for any indirect, incidental, special, consequential, or punitive damages, including but not limited to loss of data, loss of profits, personal injury, or property damage, regardless of the cause of action or theory of liability
Third-party services: We are not liable for the actions, content, or availability of third-party services we rely on (OpenAI, Google, Stripe, Apple, Supabase). Outages or changes to these services may affect the availability of certain features
Some jurisdictions do not allow the exclusion or limitation of certain damages. In those jurisdictions, our liability is limited to the fullest extent permitted by law.
11. Indemnification
You agree to indemnify, defend, and hold harmless Palaistra and its officers, directors, employees, and agents from any claims, damages, losses, liabilities, and expenses (including reasonable attorneys' fees) arising from:
Your use of the Service
Your violation of these Terms
Your violation of any rights of another person or entity
Any injury or damage to yourself or others resulting from physical activities performed while using the Service
12. Service Availability
We strive for high availability but do not guarantee uninterrupted, continuous access to the Service
The Service depends on third-party services (OpenAI, Google Gemini, Stripe, Apple, Supabase) which may experience their own outages or changes
We reserve the right to modify, update, suspend, or discontinue any feature of the Service with reasonable notice when possible
Scheduled maintenance windows will be communicated when possible
The Service degrades gracefully when AI services are unavailable — core pose estimation and analysis continue to function without Gemini or OpenAI access
13. Termination
13.1 By You
You may stop using the Service at any time. You may delete your account through the Settings screen in the app or by contacting support@palaistra.ai. Account deletion permanently removes all your data from our servers.
If you have an active paid subscription, cancelling your subscription and deleting your account are separate actions. You should cancel your subscription before deleting your account to avoid continued billing.
13.2 By Us
We may suspend or terminate your account if:
You violate these Terms, including the Acceptable Use provisions
You engage in fraudulent activity or abuse of the Service
We are required to do so by law
Your account has been inactive for more than 24 months
We will provide notice before termination when reasonably possible, except in cases of fraud or serious violations. If we terminate your account without cause, we will provide a pro-rated refund for any prepaid subscription period.
13.3 Effect of Termination
Upon termination, your right to use the Service ceases immediately. The following provisions survive termination: Sections 6 (AI Coaching Disclaimer), 8 (Intellectual Property), 9 (Disclaimers), 10 (Limitation of Liability), 11 (Indemnification), 14 (Governing Law), and 15 (Dispute Resolution).
14. Governing Law
These Terms are governed by and construed in accordance with the laws of the State of California, United States, without regard to its conflict of law principles. You agree to the personal jurisdiction of the state and federal courts located in San Francisco County, California for the resolution of any disputes.
15. Dispute Resolution
We prefer to resolve disputes amicably. Before filing any formal legal action, you agree to contact us at legal@palaistra.ai and attempt to resolve the dispute informally for at least 30 days.
If informal resolution is unsuccessful, any dispute arising from these Terms or your use of the Service shall be resolved in the state or federal courts located in San Francisco County, California.
You agree that any dispute resolution proceedings will be conducted on an individual basis and not as part of a class, consolidated, or representative action.
16. General Provisions
Entire agreement: These Terms, together with our Privacy Policy, constitute the entire agreement between you and Palaistra regarding the Service
Severability: If any provision of these Terms is found to be unenforceable, the remaining provisions will continue in full force and effect
Waiver: Our failure to enforce any provision of these Terms does not constitute a waiver of that provision
Assignment: You may not assign or transfer your rights under these Terms. We may assign our rights and obligations without restriction
No third-party beneficiaries: These Terms do not create any rights for third parties