cronos

every minute
counts.

Just a stopwatch.
Open it, pick a subject, start.

start studyingor see how it works
number theory

You study.
But how much, really?

Open it, pick a subject, start counting. What you put in shows up — at your pace, without noise.

Three decisions.
Nothing more.

timer modes

Stopwatch, Pomodoro, countdown.

Use the mode that fits the subject. Switching is one tap.

sync

Start on your phone, finish on your laptop.

All in real time. No save button, no refresh.

analytics

Time per subject, no theater.

Numbers you read in seconds. No bloated dashboards.

In less time
than it takes to open a notebook.

  1. 01

    Add your subjects

    Calculus, Civil Law, guitar practice — whatever you want to measure.

  2. 02

    Start the timer

    One tap. Fullscreen, ambient mode, zero distraction.

  3. 03

    See what you've built up

    By day, by week, by subject. Progress reveals itself.

Ready to measure
what matters?

Start now. It's free and doesn't ask for sign-up. You can save your progress later, if you want.

start studyingno card · no sign-up