COOKIE POLICY
Last updated February 16, 2026
This Cookie Policy explains how Muscle App ("we," "us," "our") uses cookies and similar tracking technologies when you visit our website at https://www.muscleapp.fit or use our mobile application.
This policy should be read in conjunction with our Privacy Policy and Terms and Conditions.
TABLE OF CONTENTS
1. WHAT ARE COOKIES?
Cookies are small text files that are placed on your device (computer, smartphone, tablet) when you visit a website or use an application. They are widely used to make websites work more efficiently, remember your preferences, and provide information to the site operators.
Similar technologies we use include:
- Local Storage: HTML5 local storage that stores data on your browser
- Session Storage: Temporary storage that expires when you close your browser
- Service Worker Cache: Used by our Progressive Web App (PWA) to cache assets for faster loading
2. WHY WE USE COOKIES
We use cookies and similar technologies to:
- Keep you logged in to your account as you navigate the platform
- Remember your preferences such as language and display settings
- Provide security features for authentication and session management
- Enable third-party services such as payment processing (Stripe)
- Optimize performance by caching data locally for faster loading
3. TYPES OF COOKIES WE USE
We categorize cookies based on their purpose:
- Essential Cookies: Required for the platform to function. You cannot opt out of these. They include authentication, session management, and payment security.
- Functional Cookies: Enhance functionality and personalization (e.g., remember your language preference).
Note: We currently do NOT use analytics or marketing cookies. If this changes in the future, we will update this policy and request your consent before activating them.
4. DETAILED COOKIE INFORMATION
Here is a complete list of cookies we use:
4.1 Essential Cookies
| Cookie Name | Provider | Purpose | Duration |
|---|---|---|---|
sb-access-token | Supabase Auth | Maintains your login session and authentication state | 1 hour |
sb-refresh-token | Supabase Auth | Allows automatic re-authentication without re-login | 30 days |
__stripe_mid | Stripe | Fraud detection and payment security | 1 year |
__stripe_sid | Stripe | Payment session management | 30 minutes |
4.2 Functional Cookies
| Cookie Name | Provider | Purpose | Duration |
|---|---|---|---|
NEXT_LOCALE | Muscle App | Stores your language preference (English or Spanish) | 1 year |
muscleapp-cookie-consent | Muscle App | Stores your cookie consent preference | 1 year |
5. LOCAL STORAGE & SIMILAR TECHNOLOGIES
In addition to cookies, we use browser local storage to improve your experience:
| Key | Purpose | Expiration |
|---|---|---|
muscleapp-workout-summary:v1 | Caches workout summaries for faster loading | Session |
Our Progressive Web App (PWA) uses a service worker solely to receive push notifications; it does not cache pages or resources.
6. THIRD-PARTY COOKIES
When you use our Services, you may receive cookies from third-party services we integrate:
6.1 Payment Processing (Stripe)
Secure payment processing and fraud detection
Privacy Policy: https://stripe.com/privacy
Stripe uses cookies to detect fraudulent payment activity and ensure secure transactions. These cookies are classified as essential because they are required for payment processing.
6.2 Authentication (Google, Apple)
Social login (Sign in with Google/Apple)
Google Privacy: https://policies.google.com/privacy
Apple Privacy: https://www.apple.com/legal/privacy/
If you choose to sign in with Google or Apple, they may set their own cookies during the authentication process.
6.3 Infrastructure (Supabase)
Database, authentication, and hosting
Privacy Policy: https://supabase.com/privacy
Supabase provides our authentication and database services. Authentication cookies (sb-access-token, sb-refresh-token) are set for session management.
7. YOUR COOKIE CHOICES AND CONTROLS
7.1 Essential Cookies
You cannot opt out of strictly necessary cookies because they are essential for the platform to function (login, security, payment processing). Disabling these would prevent you from using our Services.
7.2 Browser Cookie Controls
You can manage cookies through your browser settings:
- Chrome: Settings > Privacy and Security > Cookies and other site data
- Firefox: Settings > Privacy & Security > Cookies and Site Data
- Safari: Preferences > Privacy > Manage Website Data
- Edge: Settings > Cookies and site permissions > Manage and delete cookies
Warning: Blocking all cookies may prevent you from logging in or using certain features.
7.3 Do Not Track (DNT)
Since we do not currently use analytics or marketing cookies, the Do Not Track browser signal does not have a practical effect on our platform. However, we respect your privacy preferences and will implement DNT support if we add tracking technologies in the future.
8. UPDATES TO THIS POLICY
We may update this Cookie Policy from time to time to reflect:
- Changes in our use of cookies or tracking technologies
- New third-party services we integrate
- Changes in cookie laws and regulations
When we make material changes, we will update the "Last updated" date at the top of this policy. If we begin using analytics or marketing cookies, we will notify you and request your consent.
9. CONTACT US
If you have questions or concerns about our use of cookies or this Cookie Policy, please contact us:
Muscle App
Alcalá de Henares, Madrid 28805, Spain
Email: legal@muscleapp.fit
For privacy-related inquiries, you can also refer to our Privacy Policy, which contains information about your data rights under GDPR and how to exercise them.
© © 2026 Muscle App. All rights reserved.