Frequency Gen vs Hurtz

Frequency Gen generates audio tones from 1 Hz to 22,000 Hz with 4 wave types: sine, square, triangle, and sawtooth. Frequency controls Logarithmic slider Fine tuning +/- in 1 / 10 / 100 Hz steps Quick presets: 40, 100, 440, 1000, 8000, 16000 Hz Favorites: save up to 10 frequency + waveform combos Waveform viewer Real-time waveform (canvas), on/off Settings Volume control with a warning above 80% Light/dark theme Haptic feedback (on/off) 4 languages: EN, ES, CA, DE Silent switch detection Onboarding for new users Built-in FAQ

Hurtz is a clean, precise audio tone generator. Dial in any frequency from 20 Hz to 20 kHz and hear it instantly — great for testing speakers and headphones, tuning instruments, or producing a steady reference tone. FEATURES • Any frequency, 20 Hz – 20,000 Hz, set by a slider or typed in exactly (with a log or linear scale). • Four waveforms: sine, square, saw and triangle. • Quick presets (100, 220, 440, 1k, 10k Hz). • Nearest musical note read-out with cents (A4 = 440), handy as a tuning reference. • Frequency sweep: glide smoothly from one frequency to another over a set time. • Stereo mode: set a different frequency on the left and right channels, with a live difference (Δ) read-out. Useful for stereo and channel checks, and for binaural tones (use headphones). • A live oscilloscope view of the waveform. • Adjustable volume, and a large play/stop control. • Works on iPhone and iPad. Everything runs on your device. The app has no ads, no accounts, no tracking, and no internet access — it collects no data at all. SAFETY Sustained high-volume tones — especially very high or very low frequencies — can be uncomfortable and may risk hearing or small speakers. Start at a low volume.