The guy who started that project is one of the skylines.aero guys, Tobias Bieniek

https://blog.skylines.aero/


On Tuesday, May 12, 2015 at 11:33:10 AM UTC-4, wrote:
Somebody started developing an app two years ago, maybe someone else can finish and publish it?

https://github.com/Turbo87/skylines-ios-tracker