Privacy Policy

This Privacy Policy describes how AirCal ("we," "us," or "our") collects, uses, and shares information about you when you use our website, mobile applications, hardware sensors ("Sensors"), and other online products and services (collectively, the "Services"). This policy applies to all users of our Services ("you"). By using our Services, you agree to the collection, use, and sharing of your information as described in this Privacy Policy.

The core purpose of the AirCal sensor is to contribute to a public, open-source air quality map for the benefit of all. By connecting and registering a Sensor with our Services, you agree that the environmental data it collects will be made public.

Specifically, this includes:

• Environmental Data: Particulate matter (PM1.0, PM2.5, PM10) readings, temperature, and humidity.
• Anonymized Location Data: The latitude and longitude you provide during setup.

How we protect your privacy: To protect the privacy of our users, we do not display your exact street address on our public map. The location data is intentionally generalized or "fuzzed" to a less precise point within your general area. This ensures the data remains scientifically useful for mapping and research without revealing your specific home or location.

Data You Provide to Us

Account Information: When you create an AirCal account, we collect information such as your name, email address, and a hashed password. This information is used to secure your account and allow you to manage your Sensor.

Data Collected from Your Sensor

• Environmental Data: Real-time PM1.0, PM2.5, and PM10 readings, as well as temperature and humidity data.
• Location Data: The latitude and longitude you provide during the sensor setup process to place your readings on the global map.
• Device & Network Data: This includes the unique Sensor ID, your Wi-Fi network name (SSID), IP address, and device logs. This data is essential for troubleshooting, providing support, and maintaining the health of our network.

Data We Collect Automatically

Usage Data: When you visit our website, we may collect information using cookies and similar technologies. This includes your IP address, browser type, pages visited, and time spent on pages. We use this to understand how our Services are used and to improve the user experience.

We use the information we collect for various purposes:

• To Provide and Maintain Our Service: We use your account and device data to operate our Services, display your sensor's readings back to you, and troubleshoot your device.
• To Power the Public Map and API: As stated in our mission, we use the environmental and fuzzed location data from sensors to populate our public air quality map and open API.
• To Improve Our Technology: Aggregated, anonymous data is used to train and improve our AI-enabled environmental compensation models, making our entire network more accurate.
• To Communicate With You: We may use your email address to send you important service updates, security alerts, or to respond to your support requests.
• For Security and Compliance: We use data to monitor for security threats, prevent fraud, and comply with our legal obligations.

Publicly Shared Data

Anonymized environmental readings and fuzzed location data are shared publicly through our map and API. Your personal account information (name, email) is never made public.

Service Providers

We share information with third-party service providers who need access to such information to carry out work on our behalf. This includes cloud hosting services (e.g., Vercel, AWS), database providers, and analytics partners. These providers are bound by contractual obligations to keep information confidential and use it only for the purposes for which we disclose it to them.

Legal Requirements

We may disclose your information if we believe that disclosure is in accordance with, or required by, any applicable law, regulation, or legal process.

We take reasonable measures to help protect information about you from loss, theft, misuse, and unauthorized access. We retain your personal account data as long as your account remains active. If you delete your account, this personal data is removed. However, to ensure the integrity of our historical dataset, anonymized environmental data contributed by your sensor is retained perpetually as part of the public record.

Depending on your location, you may have certain rights regarding your personal information, including the right to access, correct, or delete your data.

You can access and update your account information through your account settings page. You may also delete your account at any time. Deleting your account will remove your personal profile and disassociate your historical sensor readings from your identity.

This Privacy Policy applies to the AirCal service and official sensors. If you build your own sensor using our open-source hardware plans and do not connect it to the AirCal network, this policy does not apply, as we would not be collecting any data from you.

We may update this Privacy Policy from time to time. If we make changes, we will notify you by revising the "Last Updated" date at the top of the policy and, in some cases, we may provide you with additional notice (such as by adding a statement to our homepage or sending you a notification).

If you have any questions about this Privacy Policy, please contact us at:privacy@aircal.com