Useful before signup

Free tools for understanding your real life

Run a calculation, test a pattern, or plan one practical change. Every tool works without an account and explains how its inputs are handled.

Track your whole day

Your day, connected

Food, sleep, movement, spending, notes, habits, and memories stay connected in one personal record.

Each tool stays focused on a single result, then points you toward the context that can make that result more useful.

Plan an asleep-by time and estimate how much caffeine may remain from each drink using an adjustable half-life model.

Compare two numeric columns from a CSV file with private, browser-based correlation analysis and a clear visual result.

Measure consistency, target coverage, rest days, and how reliably a habit returns after a missed day.

See your weekly and yearly screen-time totals, then model how much time a small daily reduction could return.

Convert recurring expenses to monthly and yearly totals, compare patterns, and model one possible change privately in your browser.

Mark activity across a rolling 35-day map and analyze streaks, protected rest, momentum, gaps, and weekday consistency.

Choose a ready-made habit pack or create an A4 monthly tracker with your own habits, then print it, save it as PDF, or download a matching CSV.