Last updated October 25, 2026

Privacy Policy

Jesús Alfredo Hernández Alarcón built the Metro CDMX app, for iOS and Android, as an Ad Supported app. This SERVICE is provided by Jesús Alfredo Hernández Alarcón at no cost and is intended for use as is.

This page is used to inform visitors regarding my policies with the collection, use, and disclosure of Personal Information if anyone decided to use my Service.

If you choose to use my Service, then you agree to the collection and use of information in relation to this policy. The Personal Information that I collect is used for providing and improving the Service. I will not use or share your information with anyone except as described in this Privacy Policy.

The terms used in this Privacy Policy have the same meanings as in our Terms and Conditions, which is accessible at Metro CDMX unless otherwise defined in this Privacy Policy.

Information Collection and Use

The app works without creating an account. When you first open it, it signs you in anonymously (Firebase Authentication) so that the station reports you submit can be linked to you and limited against abuse. You may optionally sign in with Google (or with Apple on iOS); in that case your account identifier, email address and name are stored with Firebase Authentication.

• Station reports. When you report the status of a station (for example, delays or crowding), the report, the station and line, the time, your account identifier and the app platform and version are stored. Other riders see only the current status built from recent reports. Reports are kept as history to estimate how busy stations and lines usually are by day and hour.
• Reporter record. For each account that submits reports I keep how many reports it has sent, the dates of its first and last report and the app it used. If you signed in with Google or Apple, this record also includes your email address and name; for anonymous use it does not.
• Deleting your account. If you delete your account in the app, your reporter record is deleted and your past reports are kept only without your account identifier.
• Location. If you grant location permission, your location is used on your device to show nearby stations and plan routes. It is not sent to my servers.
• Notifications. If you allow notifications, a device token is registered with Firebase Cloud Messaging so the app can send you news and service alerts. You can turn them off in the app or in your device settings.

Third-party services

The app uses the following services, which process data under their own privacy policies:

• Google Firebase: Authentication, Cloud Firestore (station reports), Analytics (anonymous usage events), Crashlytics (crash and error reports), Cloud Messaging (notifications) and Remote Config (app configuration).
• Google Cloud BigQuery: storage and analysis of the station report history.
• Google AdMob: ads. Ads may be personalized only with your consent: in the European Economic Area and the United Kingdom the app asks for consent through Google's consent form, and on iOS it asks for permission through App Tracking Transparency. If you decline, you see non-personalized ads.

Log Data

I want to inform you that whenever you use my Service, in a case of an error in the app I collect data and information (through Firebase Crashlytics) on your phone called Log Data. This Log Data may include information such as your device Internet Protocol ("IP") address, device name, operating system version, the configuration of the app when utilizing my Service, the time and date of your use of the Service, and other statistics.

Cookies

Cookies are files with a small amount of data that are commonly used as anonymous unique identifiers. These are sent to your browser from the websites that you visit and are stored on your device's internal memory.

This Service does not use these "cookies" explicitly. However, the app may use third party code and libraries that use "cookies" to collect information and improve their services. You have the option to either accept or refuse these cookies and know when a cookie is being sent to your device. If you choose to refuse our cookies, you may not be able to use some portions of this Service.

Service Providers

I may employ third-party companies and individuals due to the following reasons:

• To facilitate our Service;
• To provide the Service on our behalf;
• To perform Service-related services; or
• To assist us in analyzing how our Service is used.

I want to inform users of this Service that these third parties have access to your Personal Information. The reason is to perform the tasks assigned to them on our behalf. However, they are obligated not to disclose or use the information for any other purpose.

Security

I value your trust in providing us your Personal Information, thus we are striving to use commercially acceptable means of protecting it. But remember that no method of transmission over the internet, or method of electronic storage is 100% secure and reliable, and I cannot guarantee its absolute security.

Links to Other Sites

This Service may contain links to other sites. If you click on a third-party link, you will be directed to that site. Note that these external sites are not operated by me. Therefore, I strongly advise you to review the Privacy Policy of these websites. I have no control over and assume no responsibility for the content, privacy policies, or practices of any third-party sites or services.

Children's Privacy

These Services do not address anyone under the age of 13. I do not knowingly collect personally identifiable information from children under 13 years of age. In the case I discover that a child under 13 has provided me with personal information, I immediately delete this from our servers. If you are a parent or guardian and you are aware that your child has provided us with personal information, please contact me so that I will be able to do necessary actions.

Changes to This Privacy Policy

I may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes. I will notify you of any changes by posting the new Privacy Policy on this page.

This policy is effective as of 2026-10-17.

Contact Us

If you have any questions or suggestions about my Privacy Policy, do not hesitate to contact me at app.metrocdmx@gmail.com.