HzTones: Sleep Sounds & Focus

HzTones is a buy-once binaural beats app that gently guides you toward sleep, focus and calm. There is no subscription. One purchase unlocks every soundscape, for good.

■ Buy once, no subscription No monthly or yearly fees. Every sound is generated on your device, so there is no ongoing cost — a single purchase is all it takes. The price is shown up front.

■ Try before you buy Your first track is free, forever. A gentle prompt appears only when you reach a premium feature, and you can close any paywall with ×.

■ Choose by goal Sleep, focus, meditation, the autonomic nervous system, relaxation, nature sounds and noise. A brainwave guide explains the δ θ α β γ bands so you can pick the track that fits your state.

■ A big-Hz player Sleep timer, layer mix (tone / ambient noise / music), beat intensity, and AirPlay output.

■ 5-day quest A 15-minute-a-day habit program. Only sessions you listen through to the end count toward your progress.

■ Focus pomodoro A dedicated focus mode built around work-and-break cycles.

■ Works offline No network, no ads. Just the sound generated on your device.

Note: Binaural beats are perceived by delivering a slightly different frequency to each ear, so headphones or earphones are required. Effects vary by individual and this is not intended for medical use.