Flock Signal
Back to the websiteNederlands

Terms of use

Last updated: 31 July 2026 · Applies to Flock Signal, listed in the stores as Vogeltrek Radar / Vogelzug Radar.

By using the app you agree to these terms. Flock Signal is developed and operated from the Netherlands.

The service

Flock Signal turns KNMI radar data into an indication of bird migration. Measurements and forecasts may be delayed, incomplete or incorrect. The service is intended for nature observation, not aviation, navigation, safety or other decisions where damage could occur.

Plus subscription

Plus is an automatically renewing subscription. The current price, term and any trial are shown by the App Store or Google Play before purchase; the store price governs. After a trial, the selected plan is charged and renews automatically unless cancelled within the store's stated period.

Manage or cancel through your Apple ID or Google Play settings. Payment, cancellation and refunds are handled by the store where you purchased and are also subject to that store's terms.

Availability and fair use

We may change or temporarily interrupt the service for maintenance, outages, source changes or misuse. You may not disrupt the service, bypass security or automatically republish its data without permission.

Data and liability

Radar data: KNMI, CC BY 4.0. To the extent permitted by law, we are not liable for damage caused by use, temporary unavailability or decisions based on a measurement or forecast. Statutory consumer rights remain unaffected.

Contact

Questions? Email support@flocksignal.com. See our privacy policy.

Flock Signal · data: KNMI (CC BY 4.0)