About One.

One. is a minimal, calendar-based fitness tracker for people who want their training and their daily intake in one place, without feeds, ads or noise.

Log a workout in seconds — the exercise, sets, reps and a short note — then add the day's calories and macronutrients from a searchable food library, or scan a product's barcode with your camera. Water, steps and body weight sit alongside them, so a single day shows everything you did and everything you ate.

Set goals for the numbers that matter to you, start the activity timer before a walk, run or bike ride to record duration, distance, pace and a map of your route, and let the daily streak keep the habit visible. The analytics tab shows how a week, a month or a year of logs compares, so progress is something you can see rather than guess.

It is built for anyone who wants a simple record of a healthier routine: people training a few times a week, lifters counting every set, runners and cyclists counting every kilometre, and anyone keeping an eye on calories and macros. You choose how much detail you want to log — the app never asks for more than that.

One. is designed and built by an independent developer, and your logs stay private to your own account. The free plan covers the essentials, and Premium adds advanced analytics, barcode scanning and early access to new features.