One of the most helpful reviews for these types of apps highlights a common misconception about hardware vs. software:
: Best if you specifically need to troubleshoot your microphone or wiring. Where to download : Available on the Google Play Store . Interesting Review Download Earphone Test apk
: Bass response (20Hz–250Hz), treble evaluation, driver quality, and polarity phase tests. Where to download : Available on the Google Play Store . One of the most helpful reviews for these
Are you looking to like a broken channel, or are you just checking the frequency range of a new pair? Earphones Test+ - Apps on Google Play frequency sweeps (10Hz to 20kHz)
: L/R channel identification, frequency sweeps (10Hz to 20kHz), compatibility checks for 4-pin jacks, and "Voice/Music" fidelity tests.