Spectroid
Spectroid Summary
Spectroid is a free Android app in Tools by Carl Reinke. Released in Sep 2014 (11 years ago). It has about 4.8M+ installs and 16K ratings with a 4.65★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 403K monthly active users . Store last updated Sep 7, 2022
Recent activity: 3.4K installs this week (17K over 4 weeks) showing above average growth , and 9.00 new ratings this week View trends →
Spectroid SDKs Summary
App not yet scanned for SDKs.
4.65★
Ratings: 16K
Screenshots
App Description
Audio Spectrum Analyzer
Spectroid is a real-time audio spectrum analyzer with reasonable frequency resolution across the the entire frequency spectrum.
💬 FAQ 💬
Q: Why are the dB values negative?
A: Spectroid uses dBFS (Full Scale) where 0 dB is the maximum power that the microphone can measure, so the decibel values are negative because the measured power is less than the maximum power.
Q: Can I zoom in on the spectrum plot?
A: Yes, do a two-finger pinch-to-zoom gesture.
Q: Why are there discontinuities/gaps in the spectrum plot and waterfall?
A: Spectroid uses multiple FFTs overlapped in frequency in order to provide better frequency resolution at lower frequencies than a single FFT. The caveat of this method is varied impulse response and minor discontinuities in frequency. The upside is that it can efficiently produce a spectrum that better matches the frequency resolution of human audio perception. It's still probably not as good as your ears though!
Q: Can I export the spectrum data?
A: Spectroid doesn't make your device a calibrated instrument. If you need the spectrum data then you should be using an actual spectrum analyzer rather than an app on your mobile device.