Zephyr Lab

Privacy Policy — ZephyrRun

Last updated: 19 August 2026 · Applies to ZephyrRun v0.11+

This page covers ZephyrRun. ZephyrFit is cloud-backed and has its own policy.

Zephyr Lab (“Zephyr Lab,” “we,” “us,” or “our”) operates ZephyrFit and ZephyrRun. This Privacy Policy explains what information our apps access or collect, how that information is processed and stored, and the choices you have when using ZephyrFit or ZephyrRun (collectively, the “Services”).

ZephyrFit and ZephyrRun are designed differently. ZephyrFit is a cloud-backed service that stores fitness data you choose to provide or sync. ZephyrRun processes your fitness and activity data locally on your device and does not upload that data to Zephyr Lab.

If you do not agree with this Privacy Policy, please do not use the Services.

Data ZephyrRun Accesses

ZephyrRun is designed as a device-local fitness analytics app.

ZephyrRun may read health, fitness, workout, activity, sensor, and related data from sources that you explicitly choose to connect and authorize.

The exact information available to ZephyrRun depends on the data source and permissions you choose to grant. This may include information such as:

You control which supported sources ZephyrRun can access through the permissions provided by your device and the applicable data source.

How ZephyrRun Processes Your Data

Your fitness and activity data is processed locally on your device.

ZephyrRun reads the information you choose to make available and performs its calculations, personalization, analytics, trends, and insights on-device.

Your underlying health, fitness, workout, and sensor data is not uploaded to or stored on Zephyr Lab’s servers for processing by ZephyrRun.

This includes the data used by ZephyrRun to generate personalized metrics, charts, trends, and on-device insights.

Revoking ZephyrRun’s access to a data source prevents ZephyrRun from accessing that source in the future, subject to the behavior of your device and the applicable platform.

ZephyrRun Data Storage

ZephyrRun stores its app data locally on your device as necessary to provide its features.

Because ZephyrRun’s fitness processing is device-local, Zephyr Lab does not maintain a cloud copy of your ZephyrRun fitness and activity data.

Deleting ZephyrRun or its locally stored data may therefore permanently remove ZephyrRun-specific information that is not independently retained by the original data source or another backup system on your device.


Third Parties and Service Providers

For cloud-backed portions of our Services, we may use third-party service providers to operate infrastructure and supporting functions.

ZephyrRun’s health, fitness, workout, and sensor data processing occurs locally on your device as described above. The fact that Zephyr Lab or an app may use supporting services does not mean that your ZephyrRun fitness data is sent to those services.

Data Location

Our core network and server infrastructure for cloud-backed services is hosted in Canada.

Some service providers may process limited information in other countries depending on how their infrastructure operates. As a result, information processed through our cloud-backed services may be processed in jurisdictions outside your province, state, or country.

This does not change ZephyrRun’s device-local processing model described above: ZephyrRun fitness and activity data processed locally by the app is not uploaded to Zephyr Lab’s servers.

Your Rights and Choices

For personal information held by Zephyr Lab, you may request access to, correction of, or deletion of your personal information by contacting support-privacy@zephyrfit.ca.

For ZephyrRun data that exists only on your device, Zephyr Lab may not possess a copy of that data and therefore may be unable to access, export, correct, or delete it on your behalf. You can manage locally stored information through ZephyrRun, your device, and the applicable source of the data.

Legal Basis

Where applicable law requires a legal basis for processing, we process personal information as necessary to provide the Services you request, based on your consent where applicable, and for legitimate interests such as operating, securing, and maintaining our Services.

Children

ZephyrFit and ZephyrRun are not directed to children under 13, and we do not knowingly collect personal information from children under 13.

If you believe a child under 13 has provided personal information to us, please contact us at support-privacy@zephyrfit.ca and we will take appropriate action.

Changes to This Policy

We may update this Privacy Policy from time to time.

If we make material changes, we may update the “Last updated” date above and take other reasonable steps to notify users where appropriate.

Contact

If you have questions about this Privacy Policy or want to make a privacy-related request regarding information held by Zephyr Lab, contact support-privacy@zephyrfit.ca.