250+ iOS apps curated and reviewed
The best hertz frequency reader apps on iPhone average 4.4★ across 250+ 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 | 3.3★ (6) | Yes | No | Aug 2026 |
| 2 |  | Free | 4.7★ (340) | Yes | No | Sep 2026 |
| 3 |  | Free | 4.3★ (12) | No | Yes | Sep 2026 |
| 4 |  | Free | 4.5★ (4.8K) | Yes | Yes | Sep 2026 |
| 5 |  | Free | 4.5★ (163) | No | Yes | Sep 2026 |
| 6 |  | Free | 5.0★ (1) | Yes | Yes | Aug 2026 |
| 7 |  | Free | — | No | Yes | Aug 2026 |
| 8 |  | $0.49 | — | No | No | Jun 2026 |
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.
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 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.
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.
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.
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.
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.
Test the low-frequency capabilities of your speakers with precise sound frequencies. Pinpoint the lowest bass your audio system can produce, from 15Hz to 100Hz, to ensure you're not missing out on deep sounds in your music.
Monitor pulse and CW-lasers with high accuracy. View wavelength and intensity data for each device channel. Offers an acoustic mode for monitoring when the screen is not visible.
This app simplifies measuring glider wing frequency. Place your device on the wingtip, initiate the measurement, and gently rock the wing. The app automatically calculates and displays the resonant frequency, typically within 15 seconds and accurate to +/- 1 beat per second.
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.