250+ iOS apps curated and reviewed
Looking for free frequency scanner apps? 19 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | May 2026 |
| 2 |  | Free | 4.4★ (8) | No | No | Jul 2026 |
| 3 |  | Free | 4.5★ (4.7K) | Yes | Yes | Aug 2026 |
| 4 |  | Free | 3.4★ (83) | No | Yes | Aug 2026 |
| 5 |  | Free | — | No | Yes | Jul 2026 |
| 6 |  | Free | 3.3★ (6) | Yes | No | Aug 2026 |
| 7 |  | Free | 4.6★ (88K) | Yes | Yes | Aug 2026 |
| 8 |  | Free | 4.5★ (2.4K) | No | Yes | Aug 2026 |
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.
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.
This is the native client for an open-source project that scans and identifies audio. It offers premium features through an annual subscription, which automatically renews unless canceled.
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.
Access over 50,000 live audio feeds from police, fire, EMS, air traffic, and more. Stay informed about local and global events with real-time updates, recordings, and live chat features.
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.
Listen to live police, fire, and emergency radio broadcasts from around the world. Receive breaking news alerts and stay informed about local events and major national incidents in real time.
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.
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.
Transform your device into a professional audio analysis tool. Visualize sound in real-time with a high-resolution spectrum, perform precise sine sweep measurements, and analyze frequency content over time. Save, compare, and export your audio data.
Analyze audio frequencies in real-time using your device's microphone. Visualize audio levels, noise, and frequency ranges with a spectrum analyzer and oscilloscope. Export data for further analysis.
Listen live to police and fire dispatch audio from Pierce and King County, Washington. Search transcripts and go back in time to review past transmissions. This app provides access to P25 Phase 2 transmissions captured by volunteer-operated radios.
Control and monitor your Uniden SDS150 scanner remotely via Bluetooth. View transmissions visually, hear audio, and record incoming signals directly on your device.
