Frequency Generator: Solfeggio

528 Hz Tones: Healing, Sleep

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Type any number from 1 to 20,000 Hz and hear that exact tone — or start a Solfeggio, binaural or brainwave preset for sleep and focus, with timer and background play. PREMIUM — PURCHASE REQUIRED: All features described below are part of Pro and require a purchase: a weekly or yearly auto-renewing subscription, or a one-time lifetime purchase. Type 528 — or any number from 1 to 20,000 — and hear that exact frequency as a clean, mathematically pure tone the moment you press play. Hz Frequency is a precision tone generator and a healing-frequency player in one app: exact enough for audio work, calm enough to fall asleep to. Most apps make you choose: a sterile lab tool with no presets, or a "healing sounds" playlist that won't let you dial a precise value. Hz Frequency does both. Every tone is synthesized live on your iPhone — not a compressed looping recording — so 432.0 Hz means exactly 432.0 Hz, in sine, square, triangle or sawtooth. WHAT YOU GET • Any frequency from 1 to 20,000 Hz on demand — type it or fine-tune it, and the tone follows instantly • The classic Solfeggio ladder from 174 to 963 Hz, with 432 Hz tuning and 528 Hz one tap away, each with plain-language listening notes • Binaural beat mode turns stereo headphones into delta, theta, alpha or beta sessions for sleep, meditation, relaxing and deep work • White, pink or brown noise layered under your tone, and a sleep timer that fades everything out after you drift off • Slow sweeps that glide from 20 Hz down to 2 Hz over half an hour — press play at lights-out and let the descent do the work • Guided breathing patterns like 4-7-8 that pulse the tone with your breath, plus favorites and session history so last night's setup is one tap away Audio keeps playing with the screen locked, so a bedtime session doesn't need a lit phone on your pillow. PERFECT FOR • Falling asleep to a fading delta-range tone instead of scrolling at 1 a.m. • Meditators pairing theta tones or 432 Hz with an evening practice • Musicians, tinkerers and engineers who need an exact reference tone right now • Deep-work sessions with a steady alpha-range hum instead of a distracting playlist WHY NOT JUST A VIDEO? A "528 Hz" video is a compressed re-upload that interrupts itself with ads and stops when your screen locks. Here the tone is generated on-device at the exact value you asked for, ad-free, and it keeps playing in the background until your timer ends it. PRIVATE BY DEFAULT No account, no ads, no tracking, no microphone. Favorites, settings and session history live in your device storage and nowhere else. Solfeggio and brainwave names describe traditional associations and tone ranges — this is a listening app, not a medical device. PREMIUM (PURCHASE REQUIRED) Hz Frequency requires a Full Access purchase, which unlocks everything: the complete Solfeggio and brainwave preset library, all binaural, sweep and breathing programs, noise mixing, unlimited favorites and session history. Choose a weekly or yearly auto-renewing subscription, or a one-time lifetime purchase. Download Hz Frequency, type a number and press play — tonight's sleep tone is ten seconds away. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia

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The developer, LEAN ASIA CO., LTD, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

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    Information

    Seller
    LEAN ASIA CO., LTD
    Size
    5.3 MB
    Category
    Health & Fitness
    Compatibility
    Requires iOS 16 or later.
    • iPhone
      Requires iOS 16 or later.
    • iPod touch
      Requires iOS 16 or later.
    • Mac
      Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    • Brainwaves Lifetime $49.99
    • Binaural Beats Weekly $4.99
    • Sound Therapy Yearly $24.99
    • Learn More
    Copyright
    © 2026 LEAN ASIA CO., LTD
  • Developer Website
  • Privacy Policy

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