Only Hz plays pure healing frequencies – 432 Hz, 528 Hz and the nine Solfeggio tones – as clean sine waves for meditation, sleep, relaxation and deep focus. No ads, no subscription, no noise: just the frequency, in lossless audio.

PURE TONES, NOTHING ELSE
Most frequency apps bury the tone under music, nature sounds or binaural beats. Only Hz gives you the frequency itself, generated from validated 48 kHz / 24-bit masters and streamed in lossless FLAC. Hear 528 Hz as 528 Hz.

START FOR FREE
• 432 Hz and 528 Hz in free three-minute sessions, as often as you like

ONE-TIME PURCHASE, FULL ACCESS
An optional one-time in-app purchase unlocks everything, for good:
• All 20 pure tones, from 174 Hz to 963 Hz
• Solfeggio 9 journeys of 15, 30 or 60 minutes
• Timers of 3, 5, 10, 15, 30 and 60 minutes
• Continuous playback of any single tone
• A seekable journey timeline
No subscription. No advertising. Google Play shows the price in your local currency before you confirm.

THE SOLFEGGIO JOURNEY
Nine ascending tones, each with an equal share of the session: 174, 285, 396, 417, 528, 639, 741, 852 and 963 Hz. Explore the frequency guide and chakra themes, root to crown, for reflective listening.

FOR SLEEP, MEDITATION, STUDY AND FOCUS
• Timed sessions stop automatically – ideal for falling asleep
• Playback continues in the background or with the screen locked
• Separate tone volume, so you can listen alongside Spotify or another audio app
• Sound bath, yoga, breathwork, reading or deep work: a quiet tone that stays out of the way

BUILD A LISTENING HABIT
Complete a 15, 30 or 60-minute Solfeggio 9 journey without seeking to keep daily and weekly streaks, personal records and weekly achievements, saved on your device.

OPTIONAL GLOBAL COMMUNITY
Join the leaderboard with a public nickname. Seasons last eight weeks and the top three earn titles: Solfeggio Sovereign (permanent, with a crown), Master of Harmony and Guardian of Resonance. The fine print: one point per UTC day for a qualifying journey started after joining; missing a complete Monday-to-Sunday UTC week resets season points; your country is assigned from your network, not GPS; ties share a place; no cash rewards. You can hide or report profiles, or remove your own profile at any time. Community access is saved on this device.

GOOD TO KNOW
• Audio streams in lossless quality, so an internet connection is required. A free three-minute session uses about 7–8 MB; consider Wi-Fi for long sessions
• Already purchased? Choose Restore purchases with the Google account used for the purchase. If you paid to download Only Hz earlier and full access is missing, contact support before paying again. No Only Hz account is needed
• Frequency names and chakra themes describe spiritual traditions, not promised health effects. Only Hz is not a medical device and does not diagnose, treat, cure or prevent any condition. Keep your listening volume comfortable

Only Hz is independent of Spotify and is not affiliated with it.

Website: https://getonlyhz.com
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