Spectroid
Carl Reinke
Real-time audio frequency spectrum analyser with high resolution, logarithmic frequency display, and spectrogram history — one of the highest-quality free audio analysis tools available on Android.
SkyPaw Co.
Professional-grade sound level meter (SPL) with A and C frequency weighting, peak hold, and session logging — calibrated against IEC 61672 standard.
Measures ambient sound level in dB(A) and dB(C) using the device microphone, with an interface modelled on professional SPL meters. Includes peak-hold function, real-time bar graph, and session logging with timestamped dB readings. Some versions include NIOSH and OSHA noise exposure calculations. Frequently used by acoustical engineers and health and safety professionals. The measurement methodology follows IEC 61672 SPL meter standards.
Instrument Panel
Price model: Freemium
Store rating: 4.5
Method is technically sound and produces reproducible data.
No verified links available. Search Decibel X — Sound Level Meter on your device's app store.
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2026-06-08
All app store data is checked manually and may not reflect the most current version.
Carl Reinke
Real-time audio frequency spectrum analyser with high resolution, logarithmic frequency display, and spectrogram history — one of the highest-quality free audio analysis tools available on Android.
RedVox Inc.
Scientific-grade infrasound and low-frequency acoustic recorder used in actual seismology and atmospheric research — the highest-credibility audio tool available for investigation use.
RWTH Aachen University
University-developed physics experiment app that accesses all device sensors with full data export and remote monitoring — the most scientifically rigorous multi-sensor tool available on smartphones.