Privacy Policy

1. Overview

WienNext is a real-time departure app for public transport in Vienna, Austria. Your privacy matters to us. This policy describes what data we do (and don't) collect and how we protect your privacy.

2. Who we are

Provider: LinguaFlow e.U.

Representative: Christian Nouza

Address:
Linzer Straße 17
4100 Ottensheim
Austria

Email: hello@linguaflow.app

3. What data we collect and why

3.1 Location data

WienNext uses your GPS location to find nearby stops and display departure information.

• Processing: Only locally on your device
• Storage: Not stored. The data is only used for the current session
• Transmission: Your exact location is never transmitted to us or to external servers
• API requests: Requests to the Wiener Linien real-time API contain only stop identifiers, never location data

3.2 In-app purchases and subscriptions

WienNext uses RevenueCat to manage premium subscriptions and one-time purchases.

• Processing: RevenueCat processes purchase data in anonymized form
• Data: RevenueCat receives information such as purchase history and subscription status
• Your control: You can manage subscriptions through your App Store or Google Play account
• Privacy: See the RevenueCat privacy policy: revenuecat.com/privacy

3.3 Anonymous usage statistics (TelemetryDeck)

WienNext uses TelemetryDeck, a privacy-friendly analytics service from the EU (TelemetryDeck GmbH, Berlin), to understand anonymously how many people use the app.

• What is collected: Anonymous signals such as "app was launched" and general device information (e.g. OS version, device type)
• Anonymization: The device identifier is cryptographically hashed before transmission and anonymized server-side — it is impossible to identify you or your device
• No tracking: No advertising IDs, no linking with other services, no sharing with data brokers
• Processing in the EU: GDPR-compliant, no transfer of personal data
• Privacy: See the TelemetryDeck privacy policy: telemetrydeck.com/privacy

3.4 What we do NOT collect

• No user accounts or registration required
• No tracking via ad networks or big-tech analytics (e.g. Google Analytics, Firebase)
• No advertising or advertising IDs
• No personally identifiable information (names, email, etc.)
• No crash reports containing personal data
• No access to contacts, calendars or other private data

4. Data sources

4.1 Wiener Linien real-time data (City of Vienna Open Data)

WienNext retrieves real-time departure data from the public Wiener Linien real-time API, provided through the City of Vienna's open data programme.

• Data: Stops, trip information, real-time data
• License: Data source: City of Vienna – data.wien.gv.at (Wiener Linien), licensed under CC BY 4.0
• Your data: Your location is never shared with the API — requests contain only stop identifiers
• Note: WienNext is an unofficial app with no affiliation to Wiener Linien or the City of Vienna

4.2 RevenueCat

For premium features and subscriptions.

RevenueCat may collect aggregated usage data to provide its services. See their privacy policy for details.

4.3 TelemetryDeck

For anonymous usage statistics (see section 3.3).

TelemetryDeck (TelemetryDeck GmbH, Berlin) processes exclusively anonymized signals on servers in the EU. No personal data is stored. See the TelemetryDeck privacy policy for details.

5. Data storage and retention

• Local: Minimal settings are stored locally on your device (e.g. selected options)
• No server storage by us: We operate no servers of our own and store no personal user data
• Location data: Never stored or transmitted
• RevenueCat: Purchase data is stored according to RevenueCat's policies
• TelemetryDeck: Anonymized, aggregated usage signals are stored on TelemetryDeck's EU servers — with no personal reference

6. Your rights

As a user in Austria/the EU you have the following rights under the GDPR:

• Right of access: You can ask what data we hold about you
• Right to erasure: You can request deletion of your data
• Right to data portability: You can receive your data in a machine-readable format
• Right to object: You can object to processing

Since we collect virtually no personal data, these rights are quickly fulfilled in most cases. Contact us at hello@linguaflow.app for requests.

7. Data security

• The app communicates only with HTTPS-protected APIs
• No sensitive data is stored on devices
• App updates address security issues promptly
• We follow best practices for secure software development

8. Data transfers

Geographic location: The app can be used from anywhere, but:

• Your location is never transferred internationally
• API requests go to Wiener Linien servers (Austria)
• RevenueCat may process data in the USA

9. Children's privacy

WienNext is not intended for children under 13. We do not collect data from children. If you become aware that a child under 13 is using the app, please contact us at hello@linguaflow.app.

10. Cookies and tracking

WienNext uses no cookies, pixels, web beacons or similar tracking technologies. The only analytics component is the anonymous, GDPR-compliant usage statistics via TelemetryDeck (see section 3.3) — it does not allow tracking of individual people or devices and is not shared with advertising networks.

11. Changes to this policy

We may update this privacy policy occasionally. Updates will be published here with a new date. Significant changes will be communicated to you.

Last updated: July 20, 2026

12. Contact and complaints

Questions or concerns about this privacy policy?

You also have the right to lodge a complaint with the Austrian data protection authority (Datenschutzbehörde).