KTrax Terms and Conditions

Legal entity

KTrax is provided by a sole proprietorship: Gerhard Wesp, Holderenweg 2, 8134 Adliswil, Switzerland. Phone: +41 79 137 18 70, E-mail: gewesp@gmail.com.

Our commitments

• We run KTrax with the intention of providing a valuable quality service to the gliding and General Aviation community.
• Our services are best effort, but with our proven fast responsiveness.
• We commit to doing maintenance work on the server during times of low traffic to minimize user disruption.
• We keep backups to ensure minimum data loss in case of disruptions.
• For paying customers, we commit to personalized support with fast response times.
• Data from KTrax is public and can be shared under the Open Data Commons Open Database License (ODbL).

Your commitments

• You agree to edit data in the DDB only if you are the owner of the aircraft or acting on their behalf.
• You agree to check in as flight crew only if you are actually piloting the aircraft or acting on their behalf.
• The Logbook requires an OGN receiver station at your site. You are responsible for running it. We cannot provide support, but you are welcome to contact the OGN forum for help. As of 2021, we introduced a station health monitoring page available here.
• You agree to query backend REST APIs only with a reasonable low frequency (defined by KTrax) and only after requesting an API key.
• If you use a KTrax airport plan: You agree to obligate pilots flying at your airport to make DDB and tracking data available to KTrax via the OGN. You agree to operate an OGN station at your airport at your own cost responsibility.
• If you use a KTrax callsign plan: You agree make your DDB and tracking data available to KTrax via the OGN.

Opt-out

Please see also our Privacy Policy for information on how to opt out from KTrax services.

Other terms

• All aircraft must be registered in the DDB for KTrax service.
• KTrax depends on data from the DDB and the public Open Glider Network (OGN) APRS servers. You understand and accept that any disruption or cessation of these servers or its sources (OGN stations) will disrupt KTrax services and no warranty or liability exists in this case.
• Logbook service at airports other than your home airport require an OGN station on site (you can bring your own).
• Any free KTrax services (tracking, SAR, range analyser, station monitoring etc.) may be changed or cancelled at our sole discretion at any time.
• Please update your paper flight logs within reasonable time (once per week or month). For paying customers, we keep Logbook data for a the time period specified in the plan, but data processing and retention is best effort. There is no warranty or liability in case of data loss on our side.
• There is no warranty or liability by KTrax in case of disruption or cessation of any part of the OGN system (DDB, APRS servers, ...) or in case KTrax gets locked out from usage of OGN data.
• You acknowledge that data aggregated by KTrax (Logbook, range analyser, tracking and station monitoring, etc.) are public.
• Crew data can be hidden by a shared convenience password. It is accessible to anyone with the password. You agree to use this password only on KTrax and no other site on the internet.
• You acknowledge that crew checkin data can be modified by anyone.

Payments

In exchange for processing and refining the OGN data, we may collect payments. Please see here for details.

Data Protection

We may contact you by email occasionally, e.g. to inform you about new features, heads-up about expiring subscriptions etc.

Please see also our Privacy Policy.

This is version 3.2 of the Terms and Conditions, updated Mar 16, 2026.