Best Frequency Detector Apps

226+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated July 2026

The best frequency detector apps on iPhone average 4.4★ across 226+ titles — we've ranked them by what real users actually keep on their phones. Updated July 2026.

Compare top Frequency Detector Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1VisiWaveVisiWaveFree4.4★ (8)NoNoJul 2026
2Frequency Detector AnalyzerFrequency Detector AnalyzerFree2.3★ (3)NoYesJul 2026
3Decibel X:dB Sound Level MeterDecibel X:dB Sound Level MeterFree4.7★ (156K)NoYesJul 2026
4Frequency Counter+ Hz FFTFrequency Counter+ Hz FFTFree3.7★ (3)YesNoJul 2026
5EMF Radiation Detector ReaderEMF Radiation Detector ReaderFree4.5★ (4.5K)YesNoJul 2026
6Audio / Spectrum AnalyzerAudio / Spectrum AnalyzerFree was $10.994.6★ (970)YesYesJul 2026
7RF Signal DetectorRF Signal DetectorFree4.5★ (59)NoYesJul 2026
8Frequency: Sound GeneratorFrequency: Sound GeneratorFree4.7★ (340)YesNoJul 2026

Top Picks for Frequency Detector

VisiWave#1

VisiWave by Arias Software LLC

See the frequencies around you
Editor's Choice
🔧 Utilities
4.4(8 ratings)
Free
VisiWave screenshot 1
VisiWave screenshot 2
VisiWave screenshot 3

Visualize sound waves in real-time by detecting and displaying their frequencies in Hertz. Experience an augmented reality view of the audio environment around you.

Frequency Detector Analyzer#2

Frequency Detector Analyzer by NEURASYNC

Spectrum Analyzer EMF Decibel
Strong Contender
🔧 Utilities
2.3(3 ratings)
FreeIn-App Purchases
Frequency Detector Analyzer screenshot 1
Frequency Detector Analyzer screenshot 2
Frequency Detector Analyzer screenshot 3

This application transforms your device into a precise sound analysis tool. It offers real-time frequency detection, visualization, and data logging for musicians, engineers, and curious individuals. Gain clarity and accuracy in understanding the soundscape around you.

Decibel X:dB Sound Level Meter#3

Decibel X:dB Sound Level Meter by SkyPaw Co., Limited

Frequency Spectrum Analyzer
Worth Considering
🔧 Utilities
4.7😐(156K ratings)
FreeIn-App Purchases
Decibel X:dB Sound Level Meter screenshot 1
Decibel X:dB Sound Level Meter screenshot 2
Decibel X:dB Sound Level Meter screenshot 3
Decibel X:dB Sound Level Meter screenshot 4
Decibel X:dB Sound Level Meter screenshot 5
Decibel X:dB Sound Level Meter screenshot 6

This app transforms your device into a professional sound level meter, precisely measuring ambient noise pressure. It offers advanced features like frequency analysis, historical data management, and dosimeter functions, making it useful for various applications and entertainment.

What We Love

  • ⭐ Excellent app
  • 👍 Easy to use and understand
  • 🔍 Useful for various applications
  • 🎓 Helpful for hearing protection

Room to Improve

  • 💰 Expensive subscription model
  • 🔒 Misleading free trial
  • 📢 Intrusive ads

More Frequency Detector apps to explore

4
Frequency Counter+ Hz FFT
Frequency Counter+ Hz FFT
Frequency Counter+ Hz FFT
Audio Tone & Sound Analyzer
Free

This app transforms your iPhone into a powerful audio analyzer. It offers four distinct modes to measure sound frequencies, tune instruments, analyze motor speeds, and check mains stability. Advanced features include measurement history, comparison tools, and CSV export.

Dominant frequency measurement (Hz)Instrument tuning with note and pitch displayMotor RPM analysis
🔧 Utilities
(3)
ad-supported
5
EMF Radiation Detector Reader
EMF Radiation Detector Reader
EMF Radiation Detector Reader
Detect EMF Radiation Meter
Free

Detect electromagnetic fields (EMF) around you using your phone's sensors. Identify high-radiation zones in your home and workplace to better organize your environment and potentially improve well-being. Measure EMF emitted by various electronic devices and appliances.

Detect EMF radiationMeasure EMF levelsIdentify risk zones
🔧 Utilities
(4.5K)
free with in-app purchases
6
Audio / Spectrum Analyzer
Audio / Spectrum Analyzer
Audio / Spectrum Analyzer
RTA (FFT / Spectrogram)
Free
$10.99 | 100% OFF

This application analyzes audio input from your microphone, displaying both the waveform and amplitude spectrum in real-time. It offers extensive customization for display, calculation, and signal generation.

Simultaneous waveform and spectrum displayConfigurable display layoutsSelectable FFT size and averaging
🎵 Music
(970)
free with in-app purchases
7
RF Signal Detector
RF Signal Detector
RF Signal Detector
RF Signal Detector Analyzer
Free

This application offers real-time radio frequency signal detection and analysis. It monitors signal strength, analyzes frequency bands, and identifies interference sources. The tool provides historical data and network optimization insights for a better wireless experience.

Real-time signal monitoringFrequency band analysis (2.4 GHz & 5 GHz)Interference detection and categorization
🔧 Utilities
(59)
freemium
8
Frequency: Sound Generator
Frequency: Sound Generator
Frequency: Sound Generator
by Lucija Jaksic
Free

Generate various sound waves, including sine, square, sawtooth, and triangle, with adjustable frequencies from 1Hz to 22000Hz. Visually observe animated sound waves and control volume. Useful for testing hearing, speakers, instruments, and even cleaning water from speakers.

Generate sine, square, sawtooth, triangle wavesAdjustable frequency (1Hz-22000Hz)Animated sound wave visualization
🔧 Utilities
(340)
free with in-app purchases
9
Decibel Meter Sound Detector
Decibel Meter Sound Detector
Decibel Meter Sound Detector
Track noise around you.
Free

Monitor your surroundings with this decibel meter app. It measures sound levels in real-time, providing clear visual analysis and advanced filtering options. Easily share your readings for documentation or further analysis.

Real-time decibel (dB) readingsFrequency weighting (A, B, C, Z)Share measurements via various apps
📊 Productivity
(48K)
free with in-app purchases
10
Audio Spectrum Analyzer dB RTA
Audio Spectrum Analyzer dB RTA
Audio Spectrum Analyzer dB RTA
Sound frequency, decibel meter
Free

Analyze sound frequencies and decibel levels with this advanced tool. Ideal for tuning audio systems, it offers real-time spectrum analysis and sound metering for various applications.

Octave Band Real-Time AnalyzerFFT Plot - Fast Fourier TransformIntegrated Sound Level Meter (dB-A)
🎵 Music
(3K)
free with in-app purchases
11
HzDetect Music Frequency Tuner
HzDetect Music Frequency Tuner
HzDetect Music Frequency Tuner
Find the frequency of any song
Free

Instantly discover the tuning frequency of music around you. This app uses song recognition and advanced analysis to reveal if a track is tuned to standard concert pitch or other frequencies, offering a new dimension to your listening experience.

Detect music tuning frequencyShazam-powered song recognitionAnalyze frequency breakdown
🔧 Utilities
(1)
free
12
Frequency Sound Generator App
Frequency Sound Generator App
Frequency Sound Generator App
High Pitch Sound Generator
Free

Generate sound frequencies from 1Hz to 25,000Hz with a simple interface. Features include wave visualization, adjustable sensitivity, and multiple waveform options. Use it for hearing tests, pet training, or as a prank tool.

Frequency range 1Hz to 25,000HzWave visualizationAdjustable sensitivity
🔧 Utilities
(4.8K)
subscription
13
Decibel : dB sound level meter
Decibel : dB sound level meter
Decibel : dB sound level meter
Audio noise Spectrum Analyzer
Free

Transform your device into a professional sound level meter and audio analyzer. Measure ambient noise, monitor decibel levels, and visualize sound frequencies in real time. It also offers advanced sleep tracking with sound recognition to identify disruptions.

Real-time decibel (dB) sound level monitoringIntegrated Spectrum Analyzer (FFT, spectrogram)Sleep tracking with sound recognition
🔧 Utilities
(36K)
freemium
14
Suspicious Device Cam Detector
Suspicious Device Cam Detector
Suspicious Device Cam Detector
WiFi & Bluetooth Bug Detection
Free

Detect hidden or unrecognized devices in unfamiliar environments like hotels or rentals. Scan for unauthorized Bluetooth and Wi-Fi connections, and use an infrared camera filter to find electronics in dark areas. Track network changes and save scan history for peace of mind.

Bluetooth and Wi-Fi scanningInfrared camera filterNetwork status monitoring
🔧 Utilities
(24)
free with in-app purchases
15
Nearby Device Detector: Scan
Nearby Device Detector: Scan
Nearby Device Detector: Scan
Device Detector and Spy Finder
Free

Scan your current network for suspicious devices and identify hidden cameras or bugs using advanced AI and Wi-Fi scanning. Protect your privacy in hotels, public spaces, and more by ensuring your environment is safe.

Detect suspicious devices on Wi-FiAI-powered spy device detectionFetch device details
🌟 Lifestyle
(2.4K)
subscription
16
Frequency Analyzer
Frequency Analyzer
Frequency Analyzer
Audio Spectrum, Spectroid, dB
Free

Transform your device into a professional audio analysis tool with advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.

Real-time FFT analysisCalibrated SPL measurements32-bit float audio recording
🔧 Utilities
(97)
free with in-app purchases
17
Device Detector: Wifi Analyzer
Device Detector: Wifi Analyzer
Device Detector: Wifi Analyzer
Find Hidden Devices On Network
Free

Scan and analyze all devices connected to your local network. This essential tool helps protect your privacy by identifying everything on your network. Regular updates ensure an improved user experience.

Scan local networkAnalyze connected devicesPrivacy protection
🔧 Utilities
(3.5K)
ad-supported
18
Decibel Meter Ultra
Decibel Meter Ultra
Decibel Meter Ultra
Noise Level Frequency Analyzer
Free

Measure, record, and analyze sound levels in your environment. This app offers precision metering, noise elimination tools, hearing protection features, and home audio calibration. It provides detailed reports and can be used with device microphones or external ones.

Precision sound level meteringNoise logging and reportingHearing protection dosimeter
🔧 Utilities
(2.3K)
free with in-app purchases
19
Spy Detector: Home Analyzer Rf
Spy Detector: Home Analyzer Rf
Spy Detector: Home Analyzer Rf
Detect Security Device Scanner
Free

This app helps you protect your privacy by monitoring network activity and detecting nearby electronic devices. It allows you to scan for connected devices, analyze Wi-Fi and Bluetooth signals, and check your IP information to stay aware of your digital surroundings.

Monitor connected devicesAnalyze network activityCheck IP information
🔧 Utilities
(58)
free with in-app purchases
20
Tone Generator: Audio Sound Hz
Tone Generator: Audio Sound Hz
Tone Generator: Audio Sound Hz
Generate Audio Frequency Waves
Free

Create pure sine wave audio tones across a wide frequency range. This tool is ideal for tuning instruments, conducting hearing tests, performing science experiments, and testing audio equipment. Easily adjust frequencies and volume, with support for AirPlay devices.

Generate sine wave tonesFrequency range 20Hz - 22,000HzInstrument tuning
🎵 Music
(2.6K)
ad-supported

FAQ about Frequency Detector

What are the best frequency detector apps for iPhone?
VisiWave tops our frequency detector apps ranking as of July 2026, with a 4.4-star average from 8 App Store ratings, and it's free to download.
Yes — 20 of the top frequency detector apps we rank are free to download, including VisiWave and Frequency Detector Analyzer.
VisiWave has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 226+ frequency detector apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
VisiWave is a utility app that detects and visualizes the frequencies of surrounding sounds in real-time, displaying them as moving sound waves.
VisiWave is available for iPhone and iPod devices.

Related searches