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Best Ultrasonic Detector Apps

250+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated September 2026

If you already know Decibel X, this is the deeper bench. 250+ ultrasonic detector apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.

Compare top Ultrasonic Detector Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Decibel X:dB Sound Level MeterDecibel X:dB Sound Level MeterFree4.6★ (162K)NoYesSep 2026
2Pitch HunterPitch HunterFree5.0★ (1)NoNoSep 2026
3Frequency AnalyzerFrequency AnalyzerFree4.5★ (164)NoYesSep 2026
4NSD DetectorNSD DetectorFree—NoNoMay 2026
5Hidden Device RadarHidden Device RadarFree5.0★ (1)NoYesSep 2026
6Bat DetectorBat DetectorFree5.0★ (2)NoNoSep 2026
7Decibel Meter-measure db levelDecibel Meter-measure db levelFree4.3★ (905)YesYesSep 2026
8microsonic Ultrasonic Sensorsmicrosonic Ultrasonic SensorsFree—NoNoMay 2026

Top Picks for Ultrasonic Detector

Decibel X:dB Sound Level Meter#1

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

Frequency Spectrum Analyzer
Editor's Choice
🔧 Utilities
4.6😐(162K 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
  • 🔧 Accurate and reliable

Room to Improve

  • 💰 Expensive subscription model
  • 🔒 Misleading free trial
  • 📢 Intrusive ads
  • 🤖 Inaccurate readings compared to professional meters
  • 🤔 Confusing interface
Pitch Hunter#2

Pitch Hunter by Jared Grover

Ultrasonic detector & tones
Strong Contender
🔧 Utilities
5.0(1 ratings)
Free
Pitch Hunter screenshot 1
Pitch Hunter screenshot 2
Pitch Hunter screenshot 3
Pitch Hunter screenshot 4

This app transforms your iPhone into a sophisticated audio analysis tool. It detects and displays sound frequencies, identifies notes, and visualizes energy across the spectrum in real-time. It also features sound generation, pest repelling, and a library of animal calls.

More Ultrasonic Detector apps to explore

FAQ about Ultrasonic Detector

What are the best ultrasonic detector apps for iPhone?
Decibel X:dB Sound Level Meter tops our ultrasonic detector apps ranking as of September 2026, with a 4.6-star average from 162K App Store ratings, and it's free to download.
Yes — 20 of the top ultrasonic detector apps we rank are free to download, including Decibel X:dB Sound Level Meter and Pitch Hunter.
Decibel X:dB Sound Level Meter has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 250+ ultrasonic detector apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Decibel X turns your iOS device into a professional sound level meter. It precisely measures the sound pressure level (SPL) around you and offers advanced features like frequency spectrum analysis and historical data management.
Key features include trusted accuracy with pre-calibrated measurements, Apple Watch support, Health App integration, various frequency weighting filters (A, C, Z, ITU-R 468), powerful history data management with export options, dosimeter functions, and real-time FFT and BAR graphs for frequency analysis.