Recommendation: Good value-for-money LCR meter?

> But isn't this software program especially used for measuring loudspeaker impedance?

A loudspeaker is a lump of mixed reactances & resistances.

The same tool "should" display simpler impedance clumps, depending on range and display. (A tool centered on 100 Ohms and audio-band may not be good for a 100pFd capacitor.)