4VIDA SYNC: Binaural Beats

Adaptive sound: sleep & focus

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

Sound generated live from your heartbeat — binaural beats, biosignal-adaptive via Apple Watch. Sleep, focus, deep calm — with sound generated live from your heartbeat. 4VIDA SYNC doesn't play back a finished file. Every session is created in the moment you hear it — like a live concert instead of a recording. Via Apple Watch, the sound follows your heart rate variability (HRV) and adapts to your nervous system in real time. 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. From it emerges your personal bio-tone, the root note of every soundscape. Same mode, different person, different sound. SMART SESSIONS — SIX MODES WITH LIVE ADAPTATION • REST — drift into sleep • RECOVER — deep regeneration • RELEASE — let go • FOCUS — clear concentration • CONNECT — present and grounded • ACTIVATE — awake and ready With Apple Watch, the audio engine continuously adapts to your heart rate variability during the session — like a good running shoe adapting to your foot. ELECTRIC MOODS — SOUND FOR ALONGSIDE Four moods without ritual: FOCUS, RELAX, SLEEP and MOVE. Switch on, carry on — with a sleep timer for the night. SHARED SESSIONS Listen together: in sync at the same time, with the same reference tone. Or start a partner session with an invite code — two people, even across 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 as gentle visual companions 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 in the app. PRICE Start free. 4VIDA Plus unlocks everything — 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 no substitute for medical advice. Please note the in-app notice if you have epilepsy, wear 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.

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New in 1.0.2: • Your regulation as a daily number — from up to 5 signals, always compared with yourself, with a transparent breakdown • The bio-tone journey in the SYNC tab: your tone space over the weeks, colored by time of day • A gentle 30-second afterglow after every session — the state lingers • Headphone hint and a one-time level ritual for the best sound • Programs as clear tiles, clearer program progress • 4VIDA SYNC now also speaks Spanish, French, Italian and Portuguese • Many small improvements. Listen to your heart.

Version 1.0.2

The developer, Fabian Mahnke, 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 Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Purchases
    • Contact Info
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Health & Fitness
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Fabian Mahnke
Size
  • 349.9 MB
Category
  • Health & Fitness
Compatibility
Requires iOS 26.2 or later.
  • iPhone
    Requires iOS 26.2 or later.
  • iPad
    Requires iPadOS 26.2 or later.
  • Mac
    Requires macOS 26.2 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.2 or later.
  • Apple Watch
    Requires watchOS 26.2 or later.
Languages
English and 5 more
  • English, French, German, Italian, Portuguese, Spanish
Age Rating
9+
In-App Purchases
Yes
  • 4Vida Sync Plus (Jährlich) $24.99
  • 4Vida Sync Plus (Monatlich) $2.99
  • Learn More
Copyright
  • © Fabian Mahnke
  • Developer Website
  • Privacy Policy