Last updated: August 5, 2026
These are the rules for using cronolog. They're short on purpose. Using the app means you accept them. If you don't, don't use it — and if you already have an account, you can delete it in one click from Account → Data & privacy.
A free time-tracking app run as a personal project. It is not a company, not a paid service, and not a medical, financial or productivity-guarantee product. It records the time you tell it to record.
You need to be at least 13 years old. You are responsible for keeping your password to yourself and for everything done through your account. One person, one account — don't share logins, and don't create accounts for other people without their knowledge. Tell us immediately if you think someone else got in.
You keep every right to the activities, sessions, descriptions and messages you create. You give us only the permission we technically need to store them, sync them between your devices, and show them back to you — and, for groups you join, to show your totals to the other members of that group. We don't claim ownership, we don't sell it, and we don't use it to train anything.
When you join a group, its members can see your display name, your total tracked time for that group's chosen activity, and anything you post in its chat. They cannot see which activity, which session, or what you wrote in a session description. Anything you post in a group chat is visible to everyone in it — treat it as public.
Breaking these can cost you your account without warning. Security research done in good faith is welcome — email us before and after, and don't touch other people's data.
The app may show ads, and that's what pays for it. Whether you see personalised ads is your choice, made in the privacy banner and changeable any time. Blocking ads won't lock you out.
cronolog. is provided as is, with no warranty of any kind. It runs on free hosting tiers. It can go down, lose sync, or be discontinued. Features can change or disappear.
Keep your own backups— the CSV export in Account → Data & privacy exists for exactly this, and takes one click. To the fullest extent the law allows, we are not liable for lost data, lost time, or any indirect or consequential damage. Nothing here limits rights you have that cannot be waived, including your rights as a consumer under the Brazilian Código de Defesa do Consumidor.
You can delete your account at any moment, no reason needed, and it takes effect immediately. We may suspend or close an account that breaks section 5. If the service shuts down for good, we will give notice in the app so you can export first.
We may update these terms; the date at the top always reflects the current version. If a change is significant, we'll say so in the app. Continuing to use cronolog. after a change means you accept it.
These terms are governed by the laws of Brazil, and disputes belong to the courts of the user's domicile. If you're in the EU or UK, this doesn't remove the protection of mandatory rules in your own country.
A dedicated contact address for questions, complaints or bug reports is being set up — check this page again soon.