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Best Hertz Frequency Reader Apps

250+ iOS apps curated and reviewed

4.5 avg rating
19 free apps
Updated September 2026

The best hertz frequency reader apps on iPhone average 4.5★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.

Compare top Hertz Frequency Reader Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Frequency Counter+ Hz FFTFrequency Counter+ Hz FFTFree3.3★ (6)YesNoAug 2026
2Frequency AnalyzerFrequency AnalyzerFree4.5★ (166)NoYesSep 2026
3Frequency: Sound GeneratorFrequency: Sound GeneratorFree4.7★ (340)YesNoSep 2026
4Frequency Detector AnalyzerFrequency Detector AnalyzerFree4.5★ (17)NoYesSep 2026
5Frequency Sound Generator AppFrequency Sound Generator AppFree4.5★ (4.8K)YesYesSep 2026
6VisiWaveVisiWaveFree4.4★ (8)NoNoJul 2026
7Freq'n Awesome Tone GeneratorFreq'n Awesome Tone GeneratorFree—YesYesMay 2026
8Subwoofer Frequency TestSubwoofer Frequency TestFree4.0★ (10)NoNoSep 2026

Top Picks for Hertz Frequency Reader

Frequency Counter+ Hz FFT#1

Frequency Counter+ Hz FFT by Kyu-Hee Jang

Tuner · RPM · 50/60Hz Meter
Editor's Choice
🔧 Utilities
3.3(6 ratings)
FreeAds
Frequency Counter+ Hz FFT screenshot 1
Frequency Counter+ Hz FFT screenshot 2
Frequency Counter+ Hz FFT screenshot 3
Frequency Counter+ Hz FFT screenshot 4

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.

Frequency Analyzer#2

Frequency Analyzer by Manfred Kuegel

Sound Decibel Meter, Spectroid
Strong Contender
🔧 Utilities
4.5(166 ratings)
FreeIn-App Purchases
Frequency Analyzer screenshot 1
Frequency Analyzer screenshot 2
Frequency Analyzer screenshot 3
Frequency Analyzer screenshot 4
Frequency Analyzer screenshot 5
Frequency Analyzer screenshot 6

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.

Frequency: Sound Generator#3

Frequency: Sound Generator by Lucija Jaksic

Worth Considering
🔧 Utilities
4.7😊(340 ratings)
FreeAds
Frequency: Sound Generator screenshot 1
Frequency: Sound Generator screenshot 2
Frequency: Sound Generator screenshot 3

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.

What We Love

  • 👍 Simple and easy to use interface
  • 🎵 Accurate frequency generation
  • 💰 Free application
  • 🧘 Helpful for meditation and stress relief
  • 🔧 Multiple waveform options (sine, square, triangular, sawtooth)
  • 🎚️ Background operation capability
  • 🎯 Useful for audio calibration and testing
  • ⚡ No popup ads or payment walls

Room to Improve

  • 📢 Intrusive and inappropriate advertisements
  • 🔊 Potential audio damage to speakers/hearing
  • 🔒 Privacy concerns and data collection issues
  • 📱 UI elements off-screen on compact devices
  • 🎚️ Difficult frequency selection with slider
  • 🚫 No AirPlay support
  • ⏸️ App closes when switching to other apps
  • 😤 Pushy review request prompts

More Hertz Frequency Reader apps to explore

FAQ about Hertz Frequency Reader

What are the best hertz frequency reader apps for iPhone?
Frequency Counter+ Hz FFT tops our hertz frequency reader apps ranking as of September 2026, with a 3.3-star average from 6 App Store ratings, and it's free to download.
Yes — 19 of the top hertz frequency reader apps we rank are free to download, including Frequency Counter+ Hz FFT and Frequency Analyzer.
Frequency Counter+ Hz FFT shows ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 250+ hertz frequency reader apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Frequency Counter+ Hz FFT is a utility app that uses your iPhone's microphone to analyze audio frequencies. It offers modes for instrument tuning, motor RPM measurement, and mains hum detection.
Frequency Counter+ Hz FFT is available for iPhone and iPod touch devices. It is designed to utilize the microphone capabilities of these Apple products.