This topic is about smartphones tested with software of actual version, 1.0 now.
Sony Xperia Z - best results HTC One Mini Alcatel One Touch Pixi 3 - unexpectedly good for their price Nexus 5 YotaPhone 2 Leagoo Lead 3 - has strong high-pass filter and noise, but allows to obtain spectra
Samsung Galaxy Star Advance, Lenovo S850 - both have uncontrollable AGC (automatic gain control), the gain take on a new value each 1-2 sec depending on input signal. Final spectrum looks like superposition of several spectra with different gain value. The dispersion of the gain value is 25% approximately.