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iOS
https://apps.apple.com/jp/app/%E6%8E%A2%E3%81%97%E3%82%82%E3%81%AE%E3%81%AF-%E5%A4%8F%E3%81%A7%E3%81%99%E3%81%8B/id1527543612
Android
https://play.google.com/store/apps/details?id=com.studio_wandervogel.saganatsu&hl=ja&gl=US