[iMathDrills Stop selling AppStore]

Free campaign has ended iMathDrills.
Sales in the AppStore is quit, and then the launch of the paid version without advertising at a later date.
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iMathDrills無料キャンペーン終了しました。
AppStoreでの販売は一旦終了し、後日広告の無い有料版の発売をします。