On Apple Store it's available for iOS in AuV3 format.
Here's what they say:
Obviously octave pedals transpose guitar signals up or down by an octave, providing the perfect effect to thicken up the sound of guitar riffs. Clearly classic octave-doubling sounds awesome, as evidenced by numerous classic recordings, but throwing in a fifth up in addition to the standard octave up/down capabilities of most hardware octavers gives guitarists so much more sonic scope for creating a whole new world. Which is exactly where Quinta Pitch Machine comes into play as an octave pedal-style plug-in with a difference — by bringing an additional +1 FIFTH control to the mix.
Intro Price: $19.99 until February 15th, 2021 (Reg. $49).