PM10 Tracker (미세먼지알림이) funktioniert nicht

Even thought some users have asked for a one-time purchase for unlimitedly service, we've prepared 'subscription type' purchase in the app since the continuous server maintenance expense.  With subscription purchase, below features are provided.  Please understand that we are not afford to provide one time purchase for unlimited service.  We've added in-app purchase that many users have been requesting.  Subscription revenue will be used for building better service.  Since the first release in 2015, this app have been growing up based on user feedbacks.  This app provides national PM10 / PM2. 5 / O3 pollution map in South Korea.  Instead, we have prepared it at an affordable price so that you can use it freely.  If subscription isn't cancelled before 24 hours prior to the end of the current period, subscription renews at the purchased price automatically. • Payment will be charged to iTunes Account at confirmation of purchase(goo. gl/qEojpP). • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings(goo. gl/aS5ivs) after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Visit here (goo. gl/oaduhi) for detail guide of subscription management.