FQC - Frequency Counter
Measure frequencies & notes
Only for iPhone
Free
iPhone
FQC is a real-time audio frequency counter for iPhone and iPad..
Measure audio frequencies using your iPhone and iPad's built-in microphone. FQC displays frequency in Hz or kHz, identifies musical notes, and provides signal level monitoring in a simple, easy-to-read interface.
Features:
• Real-time frequency measurement
• Musical note identification
• High and Low Frequency detection modes
• One Shot capture mode
• Automatic noise floor calibration
• Signal level meter
• Frequency display in Hz and KHz
• Simple, distraction-free interface
The Low Frequency mode is optimized for bass notes, speakers, motors, and other low-frequency signals, while High Frequency mode provides fast response for general audio measurements.
FQC performs all frequency analysis locally on your device.
No accounts.
No subscriptions.
No advertising.
No tracking.
Designed for hobbyists, musicians, audio enthusiasts, electronics experimenters, and anyone needing a simple frequency measurement tool.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This release contains minor maintenance updates
The developer, Andrew Hazon, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Andrew Hazon
- Size
- 4.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Hazon