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Especially for those of you who understand harmony and temperament, you need this thing. It has a sophisticated metronome for the most common time signatures as well as a variety of options for subdividing. You can create recordings and analyze sound quality (overtones), change tuning and temperament, and change which instrument or type of sound wave to use for the tone generator. There are so many things this app has that wont fit in a review. This is definitely worth the purchase.

Teddy Dunn about TonalEnergy Tuner & Metronome, v1.4.2