About this app
Spectrum Analyzer+ FFT transforms your iPhone into a professional audio frequency analyzer. Using the built-in microphone, it visualizes sound frequencies in real time with a detailed FFT spectrum display. The analyzer captures live audio through the microphone and breaks it down into individual frequency bands, showing the amplitude of each frequency from 20 Hz to 20 kHz. Note: This app analyzes audio in real time for visualization purposes only — it does not record or store any audio. Key Features: - Real-time FFT audio spectrum visualization via microphone - Frequency range from 20 Hz to 20 kHz - Peak frequency detection with Hz display - Average dB level per frequency band - Adjustable dB range for detail viewing - Smooth animated bar display - Dark theme optimized for readability Whether you're a musician tuning instruments, an audio engineer checking room acoustics, or a sound enthusiast exploring frequencies, Spectrum Analyzer+ gives you a powerful visualization tool in your pocket.
Latest release
What’s New
New: save the current spectrum as a reference, then see it overlaid on the live view with the difference in dB. Treat a room, move a speaker, swap a cable — and know whether it actually helped. Thanks for the reviews and feedback!
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 18, 2026 · 2:58 AM Free
Screenshots
