4VIDA SYNC

New in 1.0: your bio-tone from a live sweep calibration, 6 modes with live HRV adaptation, Electric Moods, shared sessions. No presets. Listen to your heart.

Listen to your heart.

4VIDA SYNC is an adaptive soundscape that responds live to your heart. No playlist for millions — a sound that emerges from your own rhythm.

YOUR BIO-TONE

Before your session, 4VIDA SYNC runs a sweep calibration to find the frequency your nervous system responds to most clearly — your vital signature. It becomes your personal bio-tone, the root note of every soundscape. Same mode, different person, different sound.

SMART SESSIONS — SIX MODES WITH LIVE ADAPTATION

• REST — sleep onset • RECOVER — deep regeneration • RELEASE — letting go • FOCUS — clear concentration • CONNECT — present and grounded • ACTIVATE — awake and ready

With Apple Watch, the audio engine continuously adjusts to your heart rate variability during the session — like a good running shoe that conforms to your foot.

ELECTRIC MOODS — SOUND FOR EVERYTHING ELSE

Four moods, no ritual required: FOCUS, RELAX, SLEEP, and MOVE. Press play, carry on — with a sleep timer for the night.

SHARED SESSIONS

Listen together: in sync, at the same time, on the same reference tone. Or start a partner session with an invite code — two people, any distance.

WHAT TO EXPECT

• Your sound is generated live on your device — no streams, no sample loops • Apple Watch optional, recommended for live adaptation • Headphones recommended — the stereo texture only unfolds on two channels • Sleep timer, "Continue where you left off", Siri shortcut • Dynamic Island + Lock Screen controls • Ambient videos for gentle visual accompaniment

YOUR DATA

Your Apple Health data stays in Apple Health. Your sound is computed entirely on device. Session results are stored encrypted in your account — export them anytime, or delete your account and data right inside the app.

PRICING

Start free. 4VIDA Plus: $2.99/month or $29.99/year early-bird — 7-day free trial. The subscription renews automatically and can be cancelled anytime in your iOS settings.

GOOD TO KNOW

4VIDA SYNC is a wellness product for relaxing, focusing, and winding down — not a medical device and not a substitute for professional medical advice. Please read the in-app notice if you have epilepsy, a pacemaker, or are pregnant.

Support: https://4vida.eu/en/support Privacy: https://4vida.eu/en/datenschutz Terms of Use (EULA): https://4vida.eu/en/agb

No optimization. A return to your natural rhythm.