Solfeggio Sanctuary
Calm your nervous system in 10 minutes. All 9 frequencies, free.
Android only · One-time Pro upgrade · No subscription
Start free. Upgrade when you're ready.
The free version gives you all 9 frequencies through pure tones and tuning forks — enough to explore the full solfeggio scale. Pro adds crystal and Tibetan bowls, the subliminal message builder, and extends sessions from 10 to 60 minutes.
No subscription. No recurring charge. Pay once, own it.
Download Free — Upgrade Anytime
The 9 Solfeggio Frequencies
Each frequency targets a different internal state. You choose. The app delivers.
Foundation
The lowest tone. Used for grounding and pain reduction.
Full reference → 285 HzRenewal
Soft, low-mid acoustic character. Used during rest and recovery sessions.
Full reference → 396 HzLiberation
Targets guilt and fear. Used to shift emotional states.
Full reference → 417 HzTransmutation
Facilitates change and clears residual patterns.
Full reference → 528 HzTransformation
The most studied frequency. Associated with clarity and DNA repair research.
Full reference → 639 HzConnection
Used for relational harmony and communication.
Full reference → 741 HzAwakening
Linked to intuition and self-expression.
Full reference → 852 HzIntuition
Associated with inner clarity and spiritual order.
Full reference → 963 HzDivine Connection
The highest frequency in the scale. Activating — best for short sessions aimed at clarity and expanded awareness.
Full reference →Built on professional audio infrastructure
Solfeggio Sanctuary runs on Google's Oboe audio library — the same low-latency C++ engine used in professional Android audio applications. This means the frequencies you hear are mathematically precise. No compression artifacts. No drift. The 528 Hz you're listening to is actually 528 Hz.
"Exactly what I was looking for. No unnecessary frills, all frequencies are available for free."— Google Play Store review
Common questions
Do I need headphones?
No. Unlike binaural beats, solfeggio frequencies work through any speaker — phone, Bluetooth, or room speaker. Headphones improve focus but are not required for the mechanism to work.
What's the difference between Free and Pro?
Free gives you all 9 frequencies with pure tones and tuning forks, limited to 10-minute sessions. Pro (€4.89 one-time) extends sessions to 60 minutes and adds crystal and Tibetan bowl layers. No subscription in either version.
Which frequency should I start with?
396 Hz for anxiety or stress. 417 Hz for a morning reset. 528 Hz for focus and clarity. 174 Hz for physical tension or sleep. All are in the free version — try them and see what works for you.
How precise are the frequencies?
Mathematically exact. The app uses Google's Oboe audio library with 32-bit floating-point signal processing. The frequency you set is the frequency delivered — no drift, no approximation.
Start free. Upgrade if you want more.
Download it, try all 9 frequencies, and decide if the 60-minute sessions are worth €4.89 to you. No pressure.
Get Solfeggio Sanctuary — FreeAndroid only · One-time Pro upgrade · No subscription