About PiNumpad. Phi

PiNumpad is a free memory trainer for phi (1.61803398874989...), the golden ratio, the unique number satisfying φ = 1 + 1/φ. This page is the guided learning mode: tap each digit with the path visible, building the motor memory before removing the visual scaffold in Play mode.

Guided digit-by-digit entry. Learn mode shows the path and the digits simultaneously as you tap. Each correct tap highlights the next step; the path is always visible. This bridges the gap between passive study and active recall, letting you build the motor pattern before removing the visual scaffold.

Phi appears in geometry, art, architecture, and nature, from the proportions of the Parthenon to the spiral of a nautilus shell. It is the limit of consecutive Fibonacci number ratios. Tap each digit in order. The path remains visible throughout. When you complete a group, the next group loads automatically. Once the path feels natural in Learn mode, move to Play mode to practice without it.

PiNumpad is designed for designers, architects, artists, mathematicians, and anyone curious about the patterns underlying natural and aesthetic proportion. It runs entirely in the browser with no account, no installation, and no cost. Progress is saved locally using your browser's storage.

Play · Study · Digits · How to memorise · About

About Privacy Policy Terms of Use How to memorise hello@pinumpad.com