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Features おーろら★ふらっしゅ【フラッシュ暗算】
I created a flash mental calculation app “Aurora
★Flash”
✨You can set the number of digits, number of words, and seconds in detail
🙆We also have 3 unique difficulty settings based on mental arithmetic, etc.
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🥉Please use it for daily brain training and practice
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Available for Android 8.0 and above