You can cancel the subscription at any time through your iTunes account settings, but you must do so at least 24 hours before the end of the current month to avoid being charged, and ads will show again at the start of the subsequent month.
There is an auto-renewing subscription option within the app to track worldwide tropical cyclones, typhoons, hurricanes and other global weather hazards, and comprehensive ocean conditions forecasts for the Atlantic and Pacific oceans.
The subscription price of 0.99 USD (in your local currency) will be charged to your iTunes account at confirmation of purchase and, for each renewal, within 24 hours prior to the end of the current month.
Development of global storms is funded in part by ads, which can be removed by selecting the monthly auto-renewing subscription option "Remove Ads" from the app's settings menu.
Information in the app is courtesy of various open government sources as indicated in each section.
Removing ads also provides access to other premium content and features.
