Decibel & Frequency Meter
Spectrum Analyzer - Noise - dB
Only for iPhone
Free · In-App Purchases · Designed for iPhone
iPhone
Professional audio analysis suite with real-time FFT, dB/SPL measurements, multiple visualisations, high-precision recording, playback and extensive export features.
Transform your device into a professional-grade audio analysis suite with industry-leading 32-bit float processing, precision calibration tools, and comprehensive visualisation capabilities.
PROFESSIONAL ACOUSTIC MEASUREMENT
• Real-time FFT analysis with configurable window sizes up to 4096 points
• Reference SPL measurement with calibrated sound pressure level monitoring
• Professional microphone correction with frequency-specific calibration curves
• Reference tone calibration for precise frequency measurements
• Configurable time averaging (0-1000ms) for stable, accurate readings
• Industry-standard weighting filters: dBA, dBC, dBZ, and linear magnitude
• Multiple window functions: Hanning, Hamming, Blackman
ADVANCED VISUALISATION MODES
• High-resolution spectrum analyser with peak detection
• Real-time waveform display
• Professional spectrogram
• Octave band analysis
• Amplitude tracking over time
• Total level monitoring with min/max/average statistics
POWERFUL RECORDING & ANALYSIS
• High-quality 32-bit float audio recording and playback
• Synchronised video recording with audio analysis overlay
• Event tracking system with timestamped notes
• Playback synchronisation with all recorded events and measurements
• Location mapping for environmental noise surveys
• Export capabilities: WAV audio, CSV data, high-resolution images and videos
PRECISION DECIBEL MEASUREMENT
• Calibrated SPL measurements with reference level adjustment
• Real-time dB monitoring with peak hold functionality
• Statistical analysis: Leq, Lmax
• Configurable time averaging (0-1000ms)
• Frequency-weighted noise exposure calculations
• Exposure calculator for NIOSH and OSHA
IDEAL FOR PROFESSIONALS
• Acousticians and audio engineers
• Environmental noise consultants
• Musicians and sound designers
• Room acoustics optimisation
• Industrial noise monitoring
• Educational and research applications
• Live sound reinforcement
• Building acoustics assessment
Download now and unlock the full spectrum of acoustic measurement capabilities.
DISCLAIMER
This is a consumer application designed for general audio analysis and educational purposes. It is not a certified measurement instrument and should not be used where legally compliant or certified measurements are required. For professional acoustic assessments requiring traceable calibration or regulatory compliance, we recommend using an external calibrated measurement microphone with certified sound level metres.
EULA: https://frequency-analyzer.com/terms-and-conditions/
Ratings & Reviews
Performance improvements
Subscriptions
The developer, Manfred Kuegel, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Manfred Kuegel
- Size
- 83.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.2 or later.
- iPhone
Requires iOS 17.2 or later. - Mac
Requires macOS 14.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.1 or later.
- Languages
English and 12 more
- English, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Simplified Chinese, Spanish, Swedish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro access for lifetime USD 89.99
- Frequency Analyzer Pro Weekly USD 2.99
- Frequency Analyzer Pro Monthly USD 6.99
- Frequency Analyzer Pro Monthly USD 6.99
- Frequency Analyzer Pro Annual USD 29.99
- Frequency Analyzer Pro Annual USD 29.99
- Frequency Analyzer Pro Monthly USD 4.99
- Frequency Analyzer Pro Annual USD 44.99
- Frequency Analyzer Pro Annual USD 44.99
- Frequency Analyzer Pro Monthly USD 4.99
- Copyright
- © 2025 Manfred Kuegel
