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graphPON enables you to see the usage of IIJmio SIM with some charts.* Summary Chartshows the total amount of data in the month or last 30 days.* Daily Chartshows the daily usage in the month or last 30 days.* Ratio Chartshows the ratio of usages of sims.* Availability Chartshows the available amount of data in the month.* MoreYou can edit nickname of sims and change on/off of coupons.** This is not an official app from IIJ/IIJmio. If you need support, please contact me from Support URL.