Frequently Asked Questions

Nothing ever leaves your device. All sound is generated locally using the Web Audio API — a browser-native technology. There are no upload requests, no server-side processing. You can turn off your internet mid-session and it continues working perfectly.

Solfeggio frequencies are a set of specific sound frequencies used in sound therapy and meditation, believed to have healing properties. The classical set includes 174 Hz (pain relief), 285 Hz (energy field), 396 Hz (releasing fear), 417 Hz (change), 528 Hz (DNA repair / love), 639 Hz (relationships), 741 Hz (intuition), 852 Hz (spiritual awakening), and 963 Hz (divine consciousness). HealingSounds includes all of these plus extended pro frequencies.

Yes! Install HealingSounds as a PWA by clicking "Install App" in the header (Chrome or Edge). Once installed, it works 100% offline. Audio generation never needed the internet in the first place — it all runs on your CPU.

HealingSounds works in all modern browsers. Chrome and Edge are recommended for the best experience and PWA install support. Firefox and Safari also work well. The Web Audio API is supported across all major browsers.

Binaural beats are an auditory phenomenon that occurs when two slightly different frequencies are played separately into each ear. Your brain perceives a third "beat" equal to the difference between the two frequencies. For example, 200 Hz in the left ear and 210 Hz in the right produces a 10 Hz alpha beat, associated with relaxation. Use headphones for binaural beats to work properly.

• Delta (0.5–4 Hz) — Deep sleep and recovery
• Theta (4–8 Hz) — Deep meditation and creativity
• Alpha (8–14 Hz) — Relaxation and light focus
• Beta (14–30 Hz) — Active thinking and concentration
• Gamma (30–100 Hz) — Peak performance and insight

Yes. €29 once, forever. No subscriptions, no annual fees, no "we're switching to a subscription" surprises. Your Pro access never expires.

Yes. Your Pro license is tied to your account. Log in on any device — desktop, tablet, phone — and you have full Pro access on all of them simultaneously.

We offer a full refund within 14 days of purchase, no questions asked. Contact us via the contact page with your email and we'll process the refund promptly.

Payments are processed securely by PayPal. You can pay with your PayPal balance or any major credit/debit card. We never see or store your card details. Pro access is activated automatically within seconds of payment.