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Terms of Use

Last Updated: 9 September 2026

1. Introduction

Welcome to StableFit ("we," "our," or "us"). These Terms of Use ("Terms") govern your use of the StableFit mobile applications (coach and client) and related websites (collectively, the "Service"). The Service is operated by SavvaDev - Ihor Savva, a sole proprietorship registered in Poland. Contact: support@stable-fit.com. Registered office: ul. Bobrowiecka 10/67, 00-728 Warszawa, Poland. Tax identification number (NIP): 5214103415.

By accessing or using the Service, you agree to be bound by these Terms. If you disagree with any part of these Terms, you may not access the Service. If you use the Service as a Coach, you do so for your professional coaching activity.

2. Age Restriction

The Service is intended solely for users who are 18 years of age or older. By accessing or using the Service, you represent and warrant that you are at least 18 years old. We do not knowingly collect information from anyone under the age of 18.

3. Description of Service

StableFit is a platform that facilitates communication and progress tracking between fitness coaches ("Coaches") and their clients ("Clients"). The Service includes a Coach application and a Client application.

  • We are a Tool Provider: StableFit provides the software infrastructure. We do not provide fitness advice, medical diagnosis, or employ the Coaches using our platform.
  • No Coach Verification: We do not verify the credentials, diplomas, or certifications of Coaches. Clients are solely responsible for vetting their Coaches before engaging in any training program.
  • Client access: Client registration is available only via a personal invitation from a Coach. Clients do not pay StableFit for the Service.

4. Medical Disclaimer

StableFit is not a medical application. The content, charts, and data within the Service are for informational purposes only.

  • You should consult your physician or other health care practitioner before starting any exercise or nutrition program.
  • StableFit is not responsible for any health problems, injuries, or damages that may result from training programs provided by Coaches or your use of the Service.

5. Accounts

  • You must provide accurate information and keep your login credentials confidential. You are responsible for activity under your account.
  • Coaches may invite Clients. Coaches cannot delete Clients from the Service. If you need an account removed, the account holder may request deletion as described below.
  • To delete your own account, email support@stable-fit.com. Deletion of a Coach account does not automatically cancel an App Store or Google Play subscription; you must cancel that subscription in the store as described in Section 6.

6. Coach Subscriptions and Payments

This Section applies to Coaches. Clients are not charged by StableFit.

6.1 Plans. Coaches may use the Service under a free plan or a paid "Pro" subscription.

  • Free plan: A Coach may use the Service with full write access for up to three (3) Clients.
  • Pro: Auto-renewable monthly or yearly subscription. The title of the subscription, length of the subscription period, and price are displayed in the Coach application at the time of purchase and may vary by country and store. We do not offer a free trial.
  • If a Coach has more than three Clients and does not have an active Pro subscription (including after expiry or cancellation at the end of a paid period), the Coach's access becomes read-only: the Coach may view existing data but may not add Clients, workouts, measurements, or other write actions we designate in the app. Existing Clients and their data are not deleted because of this limit. Because Coaches cannot delete Clients, a Coach cannot return to free-plan write access by removing Clients. Restoring write access while the Coach has more than three Clients requires an active Pro subscription.

Clients currently keep using the Client application as usual if their Coach is on the free plan or in read-only mode. We may later limit Client features when the Coach is over the free limit or without Pro. If we do, we will provide prior notice through the Service or by email.

Non-payment or expiry does not immediately delete your data. The Coach account remains available on the terms of the then-applicable plan (including read-only). Retention after account deletion is described in our Privacy Policy.

6.2 How you pay. Pro is sold only as an in-app purchase through the Apple App Store or Google Play. We do not take card numbers. Apple or Google (as applicable) is the merchant of record for the transaction. Billing may be processed with the assistance of our subscription infrastructure provider (RevenueCat).

6.3 Apple App Store auto-renewable subscriptions. If you purchase Pro on iOS:

  • Payment will be charged to your Apple ID account at confirmation of purchase.
  • The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period.
  • Your account will be charged for renewal within 24 hours prior to the end of the current period, at the price disclosed to you.
  • You can manage the subscription and turn off auto-renewal in your Apple ID Account Settings after purchase (Settings > [your name] > Subscriptions).

6.4 Google Play subscriptions. If you purchase Pro on Android, payment is charged to your Google account. The subscription renews automatically until you cancel it in Google Play (Google Play > Payments & subscriptions > Subscriptions). Cancellation and refunds are handled under Google Play's policies.

6.5 Subscription is tied to your StableFit account. Pro access is attached to your Coach account and stored on our servers. Changing devices, reinstalling the app, or signing in on another device does not require a new purchase while the subscription remains active. You may use Restore Purchases in the app to resynchronize with Apple or Google. Cancellation and billing remain with the store where you originally subscribed.

6.6 Refunds. Requests for refunds of in-app purchases must be made to Apple or Google under their respective terms. StableFit cannot process store refunds and is not the merchant of record for those payments.

6.7 Price changes. Apple or Google may notify you of price changes according to their rules. Continued renewal after a change is subject to the applicable store terms and any consent they require.

6.8 Coach–Client payments. Any financial transaction for coaching services is strictly between the Coach and the Client. StableFit is not a party to those transactions and is not responsible for refunds or disputes regarding coaching fees.

7. User Content and Progress Photos

  • Voluntary upload: Clients may upload photos (front, side, back), body measurements, workouts, nutrition logs, surveys, and messages. Uploading photos is entirely optional.
  • Ownership: You retain all rights to the content you upload.
  • License to us: By uploading content, you grant StableFit a limited license to store and display this content solely to you and your assigned Coach for the purpose of providing the Service.
  • Prohibited content: You agree not to upload content that is illegal, pornographic (sexual acts), harassing, or that violates any third-party rights. We reserve the right (but have no obligation) to remove such content.

8. Acceptable Use

You may not misuse the Service, attempt unauthorized access, interfere with other users, scrape or reverse engineer the Service except as permitted by mandatory law, or use it to send spam or malware. We may suspend or terminate access for material breach, illegal activity, or risk to the Service or other users, with notice where reasonably practicable.

9. Intellectual Property

The Service, including software, design, and trademarks, is owned by us or our licensors. These Terms do not transfer any ownership to you. You may not copy, modify, or distribute the Service except as needed to use it under these Terms.

10. Limitation of Liability

To the maximum extent permitted by applicable law, StableFit shall not be liable for any indirect, incidental, special, or consequential damages, including but not limited to damages for loss of profits, data, or goodwill. We explicitly disclaim liability for any actions or advice provided by Coaches to Clients.

Nothing in these Terms limits liability for death or personal injury caused by negligence, fraud or fraudulent misrepresentation, or any liability that cannot be limited under Polish or other applicable mandatory law. If you are a consumer in the European Union, your mandatory statutory rights are not affected. Coaches use the Service as professionals; consumer withdrawal rights for digital content do not apply to professional use of Pro. In-app purchases remain subject to Apple's or Google's terms.

11. Changes to the Service and to these Terms

We may change features of the Service (including plan limits) and these Terms. For material changes, we will update the "Last Updated" date and, where required, provide notice in the app or by email. Continued use after the effective date constitutes acceptance, except where mandatory law requires a different process. If you do not agree, stop using the Service and, if you have Pro, cancel auto-renewal in the store.

12. Governing Law

These Terms shall be governed and construed in accordance with the laws of Poland, without regard to its conflict of law provisions. If you are a consumer resident in the EU/EEA, you may also bring proceedings in the courts of your country of residence, and you keep the protection of mandatory consumer rules of that country. EU consumers may use the European Commission's ODR platform.