buncha/health & fitness/breathing

Box-Breathing Coach

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on this device

Follow the circle — expand as you breathe in, settle as you breathe out. Everything runs on your device; nothing is recorded or sent anywhere.

Pairs well with

Adult Vaccine Schedule
What vaccines are due based on your age and histor
Anion Gap
Calculate the anion gap (AG = Na − [Cl + HCO3]) wi
BBT Chart
Plot basal body temperature across your cycle. Aut
Blood Pressure Tracker
Log readings, see the trend, get the ACC/AHA categ

About Box-Breathing Coach

An animated breathing pacer with box, 4-7-8, coherent and custom patterns. Follow the circle, set a session by cycles or minutes, and breathe.

Everything happens on your device. Close the tab and it's gone.
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Built browser-first. Run by one developer.
Every tool runs on your device. No tracking pixels, no sign-up to start. The numbers below are pulled live from the registry.
386
Free tools
Across 14 categories
7
Visual editors
PDF · image · video · audio
34
Curated kits
By profession + lifestyle
27
AI tools
Powered by Claude API
Files never uploadNo tracking pixelsNo sign-up neededWorks in any modern browser
The handful of AI tools (paraphrase, summarise, blog, captions, etc.) send your prompt text to Anthropic's Claude API to do the work. Files, images, PDFs and video never leave your device. Pick the tools that fit your privacy comfort.