# 4VIDA SYNC: Binaural Beats — Adaptive sound: sleep & focus

> Adaptive sound: sleep & focus (iPhone/iPad app by Fabian Mahnke.)

- Source: https://appshunter.io/ios/app/4vida-sync-binaural-beats/id6763414014 (this page in markdown: same URL + `.md`)
- Developer: [Fabian Mahnke](https://appshunter.io/developer/1854225373)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.2 · 334 MB
- Languages: American English, French (France), German (Germany), Italian, Brazilian Portuguese, European Spanish
- Released: 2026-06-16
- Data updated: 2026-07-24
- User reviews in markdown: https://appshunter.io/ios/app/4vida-sync-binaural-beats/id6763414014/reviews.md

## What is 4VIDA SYNC?

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.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 4Vida Sync Plus (Monatlich) | $2.99 | per month |
| 4Vida Sync Plus (Jährlich) | $24.99 | per year |



## Version history (last 3 releases)

### 1.0.3 — 2026-07-24

Fixes an issue that made email sign-in unusable on iOS 26.5 (invisible input fields).

### 1.0.2 — 2026-07-08

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.

### 1.0 — 2026-06-16

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-24.*