Tools
Small tools for a thoughtful week.
Three tools, built for the questions the schedule cannot answer: which class, which zone, and how to slow down. Everything runs in your browser.
No account, no email, no data sent anywhere. Your last inputs stay on this device.
How they work
No black boxes.
Class finder
Four questions score the five real classes. The highest score wins; ties resolve in the order Spin, Pilates, Sculpt, Pilates × Sculpt, Yoga.
Heart-rate zones
Max HR is estimated as 208 − 0.7 × age. Zones use Karvonen with your resting heart rate. It is a formula, not a lab test.
Box-breath timer
Three presets, three to ten rounds, an optional chime and a screen wake lock where the browser supports it. Keep the screen visible.
From tool to room
The numbers are only the start.
Take the class you found, or bring the zone chart to a spin class. Two weeks unlimited is $99 at North Park and $89 at Bird Rock.