iPhone + Apple Watch
Tera 7.83
The Earth has a heartbeat
Since life first emerged, every living creature has existed within recurring rhythms — the cycle of day and night, the pull of the moon on tides and biology, the light of the full moon shaping the behavior of countless species across the seasons.
The Schumann Resonance is another such rhythm. Around 2.4 billion years ago, early cyanobacteria began releasing oxygen. Over millions of years, oxygen accumulated, the ozone layer formed, and the ionosphere stabilized — creating an electromagnetic cavity that lightning now keeps continuously alive, humming at an average of 7.83 Hz.
Life helped create this frequency — and has been evolving within it ever since.
Tera 7.83 is a meditation app built around that frequency
Tera 7.83 uses binaural audio to guide your brain toward the Schumann resonance. Two slightly different tones — one in each ear — create a perceived beat at 7.83 Hz. Your nervous system doesn't hear the frequency directly; it follows it. Headphones are required for the full effect.
Alongside the audio, the app delivers gentle haptic pulses at a natural subharmonic — a rhythm your breath can follow if it chooses. There's no instruction, no counting, no forcing. The vibration is simply there, an invitation your body can accept or ignore.
With an Apple Watch and the Premium upgrade, Tera goes further. Your heart rate is tracked continuously across all three session phases — Calm, Meditate, and Come Out. The deeper you settle, the more your heart rate drops from Calm into Meditate. Over weeks and months you may see that number grow, a quiet measure of how your practice is deepening.
Here's how a session unfolds.
Three Phases. One Ritual.
Calm
Audio and haptics fade in gently. Your system begins to settle.
Meditate
The core of your session. Full audio, continuous haptics, heart rate monitored.
Come Out
Audio fades out gradually, ending in silence before a final bell brings you back.
Premium Features
Apple Watch Heart Rate Tracking
Unlock advanced health tracking with a one-time purchase. No subscription.
Real-Time Heart Rate
Your Apple Watch captures heart rate continuously throughout the session and streams it to the iPhone app in real time.
HR Phase Chart
See how your heart rate moved across the Calm, Meditate, and Come Out phases — displayed as a chart on the Session Complete screen.
Settling Drop
Track how much your heart rate drops from Calm into Meditate over time. The deeper you settle, the larger this number grows.
Trends Over Time
Long-term charts show your Meditate HR, Settling Drop, and session consistency across weeks, months, and years.
All sessions — free and premium — log Mindful Minutes to Apple Health automatically.
App Screenshots
The Experience
A clean, distraction-free interface designed to get out of your way.
Home Screen
Session History
Trends — Meditate HR & Settling Drop
Trends — Consistency & Streaks
Support
Questions or Feedback?
Get in touch — we'd love to hear from you. Or check the Support & FAQ page for common questions.
Tera 7.83 is designed for relaxation and general wellbeing. It is not a medical device. Consult your physician before use if you have epilepsy, a heart condition, or any other medical concern. Binaural audio is not recommended for individuals with a history of seizures.