SmaartTools Spectrum RTA is a full-featured audio spectrum analyzer available for iPhone and iPod touch devices. Developed by Studio Six Digital in collaboration with Rational Acoustics, this app brings the sophisticated analysis capabilities of Smaart v.7 to the mobile platform. The single-channel module includes features like RTA Bar graph, RTA Line graph, RTA Bar & FFT graph, and the Spectrograph, with various banding options and decay modes.

Users can zoom the frequency scale down to a single octave and the dB scale down to 1dB resolution. Real-time Spectrograph history is saved for easy reference, and additional features like high-contrast mode, variable Spectrograph speed, and Peak Tracking enhance the user experience. The app also supports split graph mode on larger devices for simultaneous graph display.