Media Punk Studios releases Signal Generator v1.8.0
iPhone, iPad / Tools / Tuners: Signal Generator is an app that produces audio test tones. The basic app produces sine waves, and it can be extended and customized (via in-app purchases) to produce white noise, pink noise, frequency sweeps, and (on iPhone 4 and better) square waves, sawtooth waves,...
www.440audio.com/en/software/vi39187-Media-Punk-Studios-Signal-Generator/