Heart/Brain 0.1 Coherence
The science of synchronized meditation and nervous system regulation.
Your sanctuary for mindfulness — precision tools for the modern mind.
Guided breathing exercises to calm the nervous system.
Customizable meditation timer with interval bells.
The science of synchronized meditation and nervous system regulation.
Advanced techniques for deep focus and extended stillness.
Finding the right duration for your experience level.
Finding your optimal rhythm for maximum calm.
The ultimate breathwork guide to calm your nervous system.
The science behind the practice (it's not woo).
Science-backed reasons to use a dedicated timer for your practice.
A meditation timer handles the clock so you don't have to. Instead of sneaking peeks at your watch, you set your duration and let interval bells anchor you. The result: deeper focus, no time anxiety, and sessions that actually end when you want them to. Our free online meditation timer includes authentic Tibetan singing bowl sounds and customizable session lengths from 1 to 60 minutes.
Breathwork directly activates the vagus nerve and shifts your autonomic nervous system from sympathetic (fight-or-flight) to parasympathetic (rest-and-digest). A guided breathwork app structures your inhale, hold, and exhale ratios so you don't have to count. Research shows that consistent practice reduces cortisol, lowers heart rate, and improves heart rate variability (HRV) — the gold-standard metric of stress resilience.
0.1 Hz (10-second rhythm) is the resonant frequency of the human cardiovascular system. When you breathe or meditate at this pace — roughly 6 breaths per minute — your heart rate, blood pressure, and brainwaves synchronize. This state, called coherence, is linked to improved emotional regulation, cognitive performance, and physical health. Learn more about heart/brain 0.1 coherence.
No. Zenith is completely free and runs in your browser. There are no accounts, no emails, no subscriptions. Just open the page and start. If you find it valuable, you can support the project — but there is never any paywall.
Start with 5 minutes. It is long enough to feel a shift but short enough to build a consistent habit. As your focus grows, progress to 10 and then 15 minutes. Research shows that daily consistency matters far more than session duration. Explore all meditation lengths to find your ideal duration.
Yes — interval bells are a core feature of the Zenith timer. Set them to ring every 1, 2, 3, 5, or 10 minutes throughout your session. Each bell serves as a gentle reminder to return to your breath without breaking your stillness. The sound uses an authentic Tibetan singing bowl sample for a warm, natural tone.
Select a time that fits your practice. From a quick reset to a deep dive.
When you only have 60 seconds... Feeling overwhelmed? You don't need an hour! In just 60 seconds, this quick meditation can instantly reduce stress and reset your mind. Perfect for beginners and those with the busiest schedules.
Learn About 1 Minute MeditationTwo minutes is all it takes to shift your state. A brief pause to breathe, center yourself, and let go of tension. Ideal for a quick mental reset between tasks or before a stressful event.
Learn About 2 Minute MeditationFive minutes is the sweet spot for building a habit. Long enough to feel a real shift in your nervous system, but short enough to fit into any morning routine. Start here to build consistency.
Learn About 5 Minute MeditationTen minutes allows you to go deeper. You'll move past the initial restlessness and find a rhythm of calm. This is where focus begins to sharpen and true relaxation sets in.
Learn About 10 Minute MeditationFifteen minutes is a powerful session length. It gives your mind ample time to settle completely. You'll experience sustained stillness and a profound sense of clarity that lasts throughout your day.
Learn About 15 Minute MeditationTwenty minutes enters advanced territory. This duration is often cited by researchers as the threshold for deep physiological changes. Expect profound relaxation and heightened awareness.
Learn About 20 Minute MeditationTwenty-five minutes is for dedicated practitioners. You'll navigate through layers of thought to reach a space of pure presence. This session builds significant mental resilience and emotional balance.
Learn About 25 Minute MeditationThirty minutes is the gold standard for deep meditation. This length allows for complete immersion. You'll emerge feeling refreshed, centered, and fully aligned with your intentions.
Learn About 30 Minute MeditationYour practice deserves a companion that fades into the background. Our free browser-based meditation timer runs directly in your browser — no apps, no sign-ups, no distractions. Set a session anywhere from 60 seconds to an hour, choose interval bells, and let the sound of authentic Tibetan singing bowls carry you through each moment. Whether you are exploring what breathwork actually does or building a daily sitting practice, this timer meets you where you are.