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\"12-year-old

12-year-old Isabel Hughes and her Irish father, Aidan, who developed, Calculator Plus, the number one-rated app worldwide on Amazon’s Android App Store Photo by: Calculator Plus

Calculator Plus app invented by Dublin 12-year-old and her dad tops Amazon’s Android App chart

\"12-year-old

12-year-old Isabel Hughes and her Irish father, Aidan, who developed, Calculator Plus, the number one-rated app worldwide on Amazon’s Android App Store Photo by: Calculator Plus

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