Privacy Policy

Last Updated: Aug 22, 2026

This Privacy Policy describes how Silas Fitness ("App", "service", "we," "us," or "our") handles information when you use the Silas Fitness iOS and watchOS applications and related services.

Silas Fitness is designed to process personal, fitness, nutrition, and health information on your device to provide personalized coaching. Much of this information is processed by the App and its AI Coach but is not collected or permanently stored by the Silas Fitness service.

1. Information We Process

Information Processed by the App and AI Coach

During normal operation, the App and its AI Coach may process information provided by you or available to the App, including:

• Profile information: Name, age, height, weight, fitness goals, training preferences, and dietary information
• Workout and exercise information: Exercises, sets, reps, weights, workout duration, effort or RPE ratings, and exercise history
• Nutrition information: Meals, foods, calories, macronutrients, dietary restrictions, barcode information, and food photos
• Health and fitness information: Information available through HealthKit and other fitness information used to provide personalized coaching
• Chat information: Prompts, questions, and other information you provide to the AI Coach, as well as information generated by the Coach in response
• Other relevant information: Information from your device or App that is necessary to provide personalized coaching

The AI Coach uses this information to understand your context and provide personalized fitness, exercise, and nutrition guidance.

HealthKit Information

With your permission, the App may access health and fitness information from Apple HealthKit, including information such as:

• Date of birth, biological sex, height, and weight
• Heart rate, resting heart rate, and heart rate variability (HRV)
• Active energy burned and basal energy burned
• Sleep information
• Workout and exercise history

The specific HealthKit information accessed by the App depends on the permissions you grant and the features you use. HealthKit permissions are controlled by Apple and can be changed at any time in your device settings.

HealthKit information is used to provide personalized fitness, exercise, and nutrition features. We do not use HealthKit information for advertising, marketing, or use-based data mining.

Information Persisted by the Silas Fitness Service

Although the App and AI Coach may process a broader range of personal, fitness, nutrition, and health information, the Silas Fitness service persistently stores only the following categories of information:

• Customer feedback: Feedback you explicitly submit, including feedback submitted through a chat request or by selecting thumbs up or thumbs down on a Coach response.
• Coach-generated activity summaries: A summary generated by the AI Coach describing the activity or interaction associated with submitted feedback.
• Usage and performance telemetry: Information about how the App is used, including features interacted with, feature response times, and other application performance information.
• Crash information: Application crash logs and information necessary to diagnose and improve application stability.

Explicit feedback, activity summaries associated with feedback, usage and performance telemetry, and crash information are associated with a device identifier. They are not associated by our service with your name, email address, physical address, or personal health profile.

2. Information We Do Not Persist

Coach input prompts and Coach-generated output messages are not persistently stored by the Silas Fitness service. Information included in a Coach prompt, including personal, nutrition, exercise, or health information, may be processed to generate the requested response but is not retained by the Silas Fitness service as a stored chat history.

Similarly, Coach responses are not persisted by the Silas Fitness service for service improvement or other purposes. The service does not use the contents of Coach prompts or Coach responses directly to improve its services.

3. How We Use Information

Information processed by the App and AI Coach is used to:

• Provide personalized workout and exercise coaching
• Provide personalized nutrition guidance
• Analyze workouts and fitness activity
• Generate responses to your requests and questions
• Provide features and functionality requested by you

Information persisted by the Silas Fitness service is used to:

• Understand and respond to customer feedback
• Evaluate and improve the quality of Coach experiences
• Monitor application performance and reliability
• Diagnose crashes and technical problems
• Understand feature usage and improve the App

We do not use HealthKit information for advertising, marketing, or use-based data mining.

4. AI Processing

The AI Coach uses third-party AI services to process information and generate coaching responses. When you use AI coaching features, information relevant to your request may be transmitted to our AI service provider.

Depending on the feature you use, this information may include personal information, exercise information, nutrition information, health and fitness information, text, or images.

Coach input prompts and output responses are not persisted by the Silas Fitness service and are not used directly by Silas Fitness for service improvement. Third-party AI providers may process information according to their applicable terms, privacy policies, and contractual arrangements with Silas Fitness.

We transmit only information that is reasonably necessary to provide the requested coaching functionality.

5. Data Storage

On Your Devices

The App may store information locally on your iPhone or Apple Watch as necessary for the App to function, including information used by the AI Coach and information needed to provide features while using the App.

iCloud

If you enable iCloud synchronization, information stored by the App may be synchronized through your personal iCloud account. iCloud data is governed by Apple's applicable privacy and security practices.

Silas Fitness Service

The Silas Fitness service does not maintain a persistent server-side database of your complete personal fitness, nutrition, health, or Coach conversation history.

The service does persist customer feedback, Coach-generated activity summaries associated with that feedback, usage and performance telemetry, and crash information as described in this Privacy Policy.

6. Data Sharing

We do not sell your personal information or share it with third parties for advertising or marketing purposes.

Information may be disclosed to third parties in the following circumstances:

• AI service providers: Information necessary to process requests and provide AI coaching may be transmitted to our third-party AI service providers.
• Service providers: We may use service providers to host, process, secure, monitor, or operate portions of the Silas Fitness service. These providers may access only the information necessary to perform services on our behalf and are subject to appropriate confidentiality and data protection requirements.
• Legal requirements: We may disclose information when required to do so by law, regulation, legal process, or governmental request, or when necessary to protect the rights, safety, or property of Silas Fitness, our users, or others.
• Business transactions: Information may be transferred as part of a merger, acquisition, financing, reorganization, sale of assets, or similar business transaction, subject to applicable legal requirements.

7. Data Retention and Deletion

We retain service-side feedback, activity summaries associated with feedback, usage and performance telemetry, and crash information for as long as reasonably necessary for the purposes described in this Privacy Policy, including providing, maintaining, securing, and improving the App.

Coach prompts and Coach responses are not persistently stored by the Silas Fitness service.

Information stored locally by the App remains on your device until you delete it or remove the App, subject to your device's operating system and backup settings.

If you use iCloud synchronization, information may also remain in your iCloud account until it is deleted according to Apple's applicable iCloud controls and retention practices.

You may request deletion of service-side information associated with your device by contacting us at support@silasfitness.com.

8. Children's Privacy

The App is not intended for users under 18 years of age. We do not knowingly collect personal information from children under 18.

9. Security

We use reasonable technical and organizational measures designed to protect information against unauthorized access, disclosure, alteration, or destruction. Information transmitted between the App and our services is protected using encryption in transit, including HTTPS where applicable.

No method of electronic transmission or storage is completely secure, and we cannot guarantee absolute security.

10. Your Rights

Depending on where you live, you may have rights regarding your personal information, including the right to:

• Request access to personal information we maintain about you
• Request correction of inaccurate information
• Request deletion of personal information
• Object to or restrict certain processing
• Request a copy of certain information in a portable format
• Withdraw consent where processing is based on consent

To exercise these rights or ask questions about our privacy practices, contact us at support@silasfitness.com.

11. Changes to This Policy

We may update this Privacy Policy from time to time to reflect changes in the App, our services, or applicable legal requirements. When we make material changes, we will update the "Last Updated" date and provide additional notice where required by law.

12. Contact

If you have questions about this Privacy Policy or our handling of your information, contact us at support@silasfitness.com.