Thoughtfully designed tools for knowing your body

18v20 Studio creates privacy-first tracking tools, starting with the I Know My Body Android app and a printable period tracker.

Thoughtfully designed tools for knowing your body

18v20 Studio creates privacy-first tracking tools, starting with the I Know My Body Android app and a printable period tracker.

Free printable

Start tracking privately with one clear sheet

Download the Private Period Tracking Starter Sheet for a simple, low-pressure way to track your cycle on paper. Good for beginners, privacy-minded users, or anyone who wants a clearer starting point before committing to a full system.

No account required. Printable. Designed for private tracking.

Get the starter sheet
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The studio

Designed to be private, useful, and beautiful

18v20 Studio creates body tracking tools that respect privacy, reduce friction, and feel thoughtful enough to keep using.

Privacy-first

Designed to feel safe, personal, and respectful from the start.

Actually useful

Built to support real tracking habits with clarity, not clutter.

Beautifully made

Crafted with the same care for hierarchy, calm, and usability as a premium product brand.