Sonic generates a sine wave tone with easy precise control over the frequency. Simply swipe your finger up and down anywhere on the screen to raise or lower the tone frequency. Swipe slowly for small frequency adjustments quickly for larger adjustments. 

Sonic features you will love:
• Generate tones from 0 Hz to Ultrasonic 25 kHz.  
• Control Sonic from your Apple Watch.  
• Use other apps with Sonic in the background.
• Broadcast Sonic to bluetooth and Airplay speakers.

More features available as in-app purchases:
• Save your favorite tone as a preset.
• Choose from five different classic wave forms.