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Tera 7.83

A meditation app tuned to the Schumann resonance with Apple Watch heart rate tracking

A meditation app that uses binaural audio at 7.83 Hz to guide your brain toward the Schumann resonance, with optional Apple Watch heart rate tracking.

About

Screenshot of the Tera 7.83 homepage
Homepage of Tera 7.83

Tera 7.83 is a meditation app built around the Schumann resonance, a frequency of 7.83 Hz generated by Earth's electromagnetic cavity. The app uses binaural audio to guide your brain toward this frequency, with two slightly different tones creating a perceived beat. Alongside the audio, it delivers gentle haptic pulses at a natural subharmonic that your breath can follow.

Sessions flow through three phases: Calm, where audio and haptics fade in gently; Meditate, the core session with full audio and continuous haptics; and Come Out, where audio fades gradually. With an Apple Watch and a Premium purchase, the app tracks heart rate continuously across all phases, showing how your heart rate drops from Calm into Meditate as your practice deepens.

The app logs Mindful Minutes to Apple Health automatically. All session history syncs via iCloud across your personal devices.

Features at a glance

  • Binaural audio at 7.83 Hz
  • Haptic pulse feedback
  • Three session phases: Calm, Meditate, Come Out
  • Real-time Apple Watch heart rate tracking
  • Heart rate phase chart
  • Settling Drop tracking
  • Long-term heart rate trends
  • iCloud sync across devices
  • Apple Health integration
  • Works on iPhone without Apple Watch

Pricing

Pricing model: Freemium

Free sessions with binaural audio and haptics on iPhone. Premium is a one-time purchase for Apple Watch heart rate tracking and HR trend charts.

Quick answers

Does Tera 7.83 work without an Apple Watch?
Yes. The binaural audio, haptic pulse, and all three session phases work on iPhone alone. Apple Watch adds real-time heart rate tracking and HR trend charts, which require Premium and a paired Watch.
Is Premium a subscription?
No. Premium is a single one-time payment. You pay once and own it forever, including all future updates to the Premium feature set.
Can I use Premium on multiple devices?
Yes. Premium is a one-time purchase tied to your Apple ID, not a subscription. Use Restore Purchases on any device signed into the same account.
Why is heart rate data missing from the start of my session?
Apple Watch heart rate monitoring typically takes 15–30 seconds to start after a session begins. The sensor needs a moment to lock on, and the Watch app needs to establish a connection with your iPhone.
Will my session history sync if I reinstall the app?
Session history syncs via iCloud. After reinstalling, open the app and wait 1–2 minutes. Your sessions will reappear automatically as long as you are signed into the same Apple ID.

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