249+ iOS apps curated and reviewed
The best frequency detector apps on iPhone average 4.5★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.3★ (12) | No | Yes | Aug 2026 |
| 2 |  | Free | 4.7★ (160K) | No | Yes | Aug 2026 |
| 3 |  | Free | 4.4★ (8) | No | No | Jul 2026 |
| 4 |  | Free | 3.7★ (3) | Yes | No | Aug 2026 |
| 5 |  | Free was $10.99 | 4.6★ (983) | Yes | Yes | Aug 2026 |
| 6 |  | Free | 4.7★ (340) | Yes | No | Aug 2026 |
| 7 |  | Free | 5.0★ (1) | No | Yes | Aug 2026 |
| 8 |  | Free | 4.5★ (4.7K) | Yes | Yes | Aug 2026 |
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.
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.
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.
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.
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.
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.
This app helps you protect your privacy by detecting hidden microphones and other surveillance devices. It uses multiple scanning methods, including Wi-Fi, Bluetooth, thermal, and EMF sensors, to identify potential threats in your surroundings. Ensure your personal space is secure wherever you go.
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.
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.
Instantly analyze musical keys from any frequency in Hertz. It displays the corresponding musical note, cents deviation, and whether it's in key with your selected musical scale. Features vocal context notes and a full frequency chart for EQ guidance.
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.
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.
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.
This tool uses your iPhone's magnetometer to measure electromagnetic field (EMF) activity in real time. Visualize EMF levels with clear indicators and receive haptic alerts when levels rise. Explore your surroundings with confidence by understanding magnetic field strength.
Analyze your wireless environment by scanning connected Wi-Fi devices, nearby Bluetooth signals, and magnetic activity. Gain insights into your digital surroundings and optimize your network. Includes helpful tips for effective analysis.
This app helps you monitor your digital surroundings by scanning for nearby Wi-Fi and Bluetooth connections, identifying unauthorized devices. It also features infrared scanning to detect hidden electronics and provides IP data for connection insights. All scan results are stored for review.
