221+ iOS apps curated and reviewed
If you already know Decibel X, this is the deeper bench. 221+ ultrasonic detector apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of June 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.7★ (156K) | No | Yes | Jul 2026 |
| 2 |  | Free | 4.5★ (97) | No | Yes | Jul 2026 |
| 3 |  | Free | 5.0★ (1) | No | No | May 2026 |
| 4 |  | Free | 4.6★ (36K) | Yes | Yes | Jul 2026 |
| 5 |  | Free | 5.0★ (2) | No | No | May 2026 |
| 6 |  | Free | 4.6★ (2.3K) | Yes | Yes | Jul 2026 |
| 7 |  | Free | 4.4★ (215) | No | Yes | Jul 2026 |
| 8 |  | Free | — | No | No | May 2026 |
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.
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.
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.
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.
Listen to and record the ultrasonic sounds of bats using your iPhone or iPad. This app reveals bat acoustics through heterodyne detection and 16x time expansion, making their calls audible and musical. It also offers full-spectrum recordings triggered by bat sounds.
Measure, record, and analyze sound levels in your environment. This app offers precision metering, noise elimination tools, hearing protection features, and home audio calibration. It provides detailed reports and can be used with device microphones or external ones.
This science-backed wellbeing app guides you through evidence-based actions to enhance happiness, health, and energy. It helps build simple habits to improve clarity, boost energy, reduce anxiety, and enhance sleep, making wellbeing practices sustainable for daily life.
This app works with a specialized hardware module to detect, record, and identify bats by their ultrasonic echolocation calls. It offers real-time listening, spectrogram visualization, and automatic species identification for outdoor enthusiasts, citizen scientists, and researchers.
This tool helps you detect hidden cameras using multiple methods, including network scanning, flash illumination, Bluetooth detection, and magnetic sensors. It's designed to enhance your privacy and safety in various locations like hotels and public spaces.
Manage your account, book classes, and access on-demand content. Stay connected with announcements, promotions, and direct messaging. This app simplifies engagement with a fitness community.
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.
This application uses your smartphone's magnetic sensor to detect nearby metal objects. It can help you find hidden metallic items, act as a treasure hunting tool, or even assist in ghost hunting by visualizing magnetic field trends. Requires a device with a magnetic sensor to function.
Detect hidden cameras and microphones using your device's magnetic field sensor. This app helps secure your privacy in various locations by identifying electromagnetic fields emitted by electronic devices.
This sound measurement app detects high-frequency and ultrasonic noises that are inaudible to humans. It helps identify potentially harmful noise sources, especially those used to deter pests or young people. The app offers modes to detect and pinpoint the direction of these sounds.
This app acts as a versatile detection toolkit, helping you find hidden metal objects, magnetic fields, and potential spy cameras. It also includes tools to check your WiFi network for unknown devices and scan your email for data breaches, enhancing your safety and aiding home improvement projects.
Repel common household pests like rats, mice, spiders, and ants using high-frequency ultrasound. This app creates an uncomfortable environment for pests, encouraging them to leave your home within days. It is designed to be safe for humans, cats, dogs, birds, and reptiles.
This app uses a radar to detect paranormal spirits and ghosts in your surroundings. It offers a camera view for better visibility and allows for communication with detected entities without using your voice. It is intended as a prank application.
This application measures noise and sound levels using your device's microphone. It displays results in decibels on a logarithmic graph and allows for calibration to ensure accuracy. You can record minimum, average, and maximum sound levels.
Detect paranormal activity using multiple scanning frequencies, including EVP, EMF, and video. Explore your surroundings by listening for unusual sounds or asking questions to the other side. This app is designed for entertainment and novelty.