Binaural Beats & Sleep Sounds

Every other app in this category ships you a folder of recordings. This one ships an engine. Hertza is a paid app. The nine Solfeggio tones play for free; every other sound and feature described here is part of Hertza Pro, a paid subscription, or the one-time Lifetime purchase. Hertza builds every sound as you listen — sample by sample, on your device. That one decision changes everything: any frequency you want instead of a fixed list, sessions that run all night without a seam, and an app that works in airplane mode from the moment you install it. A DIAL, NOT A PLAYLIST Drag the ring anywhere from 20 Hz to 20 kHz and the tone follows you instantly. Set the carrier and the beat separately — 200 Hz carrier, 4.5 Hz beat, exactly. Four modes: binaural, isochronic, monaural, and a clean single tone. SESSIONS THAT DON'T BREAK There is no loop point, because nothing repeats. No decode buffer to run dry at 3 a.m., no click when it starts, no thump when it comes back after a phone call. It fades in, it fades out, and in between it simply keeps going. PROGRAMS THAT MOVE Eight sequenced sessions that ramp between stages instead of looping one tone at you all night. Full Night walks from Alpha down to Delta across ninety minutes, with a brown-noise bed that rises as the tones fall. Build your own with any stages you like. LAYER THE WHOLE MIX Stack up to sixteen sounds at once — tones, seven noise colours, and seven nature beds that are generated too, not sampled. Rain, ocean, wind, fire, night. Each layer gets its own volume, pan, solo and mute. BUILT FOR iOS, PROPERLY Home Screen and Lock Screen widgets, a Live Activity while a session runs, Siri and Shortcuts, background audio, and optional mindful-minute logging to the Health app. NO ACCOUNT, EVER No sign-up, no email, no server. Your presets and history stay on your device. Hertza is a sound app for relaxation, focus and sleep. It is not a medical device and does not diagnose or treat anything. Start at a low volume. WHAT'S FREE AND WHAT'S PAID Free: the nine Solfeggio tones, for as long as you like. Hertza Pro (paid): every other frequency and mode, the full library, the eight programs, layering, the noise colours and nature beds, the sleep timer and saved mixes. Hertza Pro is an auto-renewing subscription — weekly, which starts with a 3-day free trial for new subscribers, or yearly — or a one-time Lifetime purchase. Prices are shown in the app before you confirm and are charged to your Apple Account. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the current period ends. Manage or cancel any time in your Apple Account settings. Support: https://app.notion.com/p/Support-Hertza-3ad0cc7ee73680d2a6faecff27ad6410 Privacy Policy: https://app.notion.com/p/Privacy-Policy-Hertza-3ad0cc7ee73680fa816ee6d6119b9348 Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/