Tonscape: Precise tone generator + live spectrum analyzer

Tonscape is a precise sine-wave tone generator and real-time spectrum analyzer in one app. Dial in any frequency your device can produce — 0.01 Hz to ~24 kHz — typed or swept, then prove it: the mic analyzer shows a live FFT with peak-hold and whether a frequency is present above the noise floor. Great for testing speakers, headphones and subwoofers, tuning and audio education. Pro ($0.99 one-time) adds binaural beats, white/pink/brown noise, nature sounds and a sleep timer. No tracking.

Hey Product Hunt 👋 Tonscape started as a tool I wanted for testing speakers and headphones: a tone generator precise to 0.01 Hz, paired with a live mic spectrum analyzer so you can actually confirm a frequency is present above the noise floor — not just trust that it's playing. Then I added a relax/sleep side (Pro): binaural beats, white/pink/brown noise, nature sounds, and a sleep timer with background playback. The core generator + analyzer is free; a one-time $0.99 unlocks the sound-design and sleep tools. On-device, no tracking. (No health claims — the Schumann/Solfeggio presets are just labeled frequencies.) Would love feedback from audio folks on the analyzer's accuracy, and from the sleep/focus crowd on the presets.