It is an application that made it easy to see the coupon usage status of IIJ mio. In a pie chart, you can intuitively see the proportion you are using. Basically, we make it possible to browse the data of this month's list. Since we are using the coupon API, we need to update the authentication information once every 90 days. This application is created using API of iij. Https://api.iijmio.jp/mobile/d/ Therefore, please understand that there is a possibility that it can not be used due to API