This app has been updated by Apple to display the Apple Watch app icon.

Updates for iOS 10.3.
Updated data source for Aurora images.

Adds several additional Ionosonde sites

Added automatic updates to the propagation map, displaying the areas of the world where your signal can be heard (or a signal can be heard from), based on the frequency, transmitter power, and current solar flux, date, and time.

Added a propagation map, displaying the areas of the world where your signal can be heard (or a signal can be heard from), based on the frequency, transmitter power, and current solar flux, date, and time.

Updates for new Space Weather Prediction Center data format.
Fixed a bug that could cause a crash when the app is launched.
Updates for iOS 8.

Updates for iOS 7.1
Added Ionosonde graphs
Added MUF Calculator

Bug fixes for iOS 6