Do I need True RMS in a multimeter?

True RMS gives accurate readings on non-sinusoidal (distorted) AC signals common around motor drives, VFDs and electronics. Reviewers in r/electricians and r/PLC treat True RMS as important for industrial and commercial work, which is why the Fluke 87V and 117 are popular there. For simple DC, battery and household checks, non-True-RMS meters are usually adequate.