This site does not collect any personal data, unless you register as a user. In this case your Email and password (encrypted) is stored.
No spam, no disclosure
Frankly: All data collected will not be used for spamming and will not be given to third parties. The data required to use this service is your email and a password to distinct you from other pilots.
No tracing, no tracking
The app does not collect user information and it will not trace you. If that would ever be the case, you have to opt-in for that.