One mind.
One task.

A macOS menu bar app that helps you focus on what truly matters. One intention. Each day.

Isshin means "one heart", one mind" or "wholeheartedness" in Japanese — the practice of giving your complete attention to a single, worthy goal.

Most productivity tools encourage you to capture everything. To build elaborate systems. To track dozens of tasks across multiple projects. They promise control but deliver fragmentation.

Your attention gets divided. Your mind scattered. You end each day having touched many things but completed nothing that mattered.

Isshin asks a different question: What if you could only choose one thing today? Not your top 10. Not your "must-dos." Just one.

When you commit your full attention to a single intention, something shifts. The noise falls away. You stop managing tasks and start making progress.

One mind. One task. Every day.

Three touchpoints. Zero friction.

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The Morning Ritual

Start each day with clarity. Set your one focus before the chaos begins.

🎯

Gentle Reminders

Periodic check-ins keep you aligned without breaking flow.

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Flow Indicator

Your menu bar reflects your state. One glance tells the truth.

Your brain is designed for this.

The neuroscience backs what ancient philosophy knew: your brain can only truly focus on one thing at a time.

The Reticular Activating System (RAS) is a network of neurons in your brainstem that acts as your brain's filter. Every second, millions of sensory inputs compete for your attention. The RAS decides what gets through to your conscious awareness.

Here's what matters: Your RAS strengthens whatever you train it to notice. When you set a clear intention—one focus for your day—your brain begins filtering the world to support that goal.

This isn't mystical. It's biology. When you tell your brain what matters, it mobilizes your limited attentional resources accordingly.

But here's the problem: most people never give their RAS clear instructions. They start each day with dozens of competing priorities. Their brain doesn't know what to filter for, so it lets everything through. Overwhelm follows.

Isshin works with your brain, not against it. One clear intention each morning. One filter. One focus. Your RAS does the rest.