Terms

Last updated 15 October 2026

What Locus is

Locus is a study timer that runs in your browser and keeps your data on your device by default, with an optional paid tier (Pro) that adds a few extras. By making an account or using it you agree to these terms.

The free version

The timer, your subjects and sessions, your streak, the sentry that keeps you honest about drifting off, and the basic version of Settings are free and stay free. You need a free account (an email and a password) to use the web version; the privacy page says what that involves. You must be at least 13 to make one.

Your account

• Keep your password to yourself, and tell me if you think someone else has your account.
• Pick a username that is yours to use: no impersonating other people, and nothing hateful or harassing. Usernames are visible to friends and searchable by exact match.
• Don't use Locus to attack, overload or probe the service, or to get at other people's data.
• I can close an account that breaks these rules. You can delete your own at any time in Settings → Your account.

Locus Pro

Pro adds extras on top of the free app: a daily study plan built from your exam dates, topics with spaced review, a weekly report on your own log, two extra characters and five “Pro marks” earned by using those tools (kept apart from your badges, level and streak), the twelve-week review (how much time you've lost to drifting, and whether your pace gets you to your exam in time), the Locked strictness tier with a door that stays shut for a while after you walk out early, dates and exams past the free limit, exporting your log as a spreadsheet, and a few extras to make the app your own (accent looks, more sound mixes and pinned favourite songs). Everything Pro adds is built from sessions you already logged for free — Pro doesn't change how the timer works, only what it shows you about your own data.

• Trial. A one-time, seven-day trial of everything in Pro. No card is asked for, it doesn't renew into anything on its own, and it simply stops at the end.
• Paying. The price is shown on the Pro page and again at checkout. Buying a plan takes you to a Stripe checkout page, away from Locus; your payment details, receipt and any subscription renewal are between you and Stripe, under Stripe's own terms.
• On your account. Pro belongs to the account you bought it with. It switches on by itself once Stripe confirms the payment, on every device where you sign in to that account, and renews with your subscription. There is no key to keep.
• Cancelling and refunds. You can cancel a subscription any time with Manage billing on the Pro page, or the link in your Stripe receipt; Pro then stays until the period you paid for ends. Deleting your account does not cancel the subscription, so cancel first. For a refund, write to [contact address not set yet] and I will look at it fairly. Any statutory cooling-off rights in your country apply as usual.

About license keys

Paid Pro lives on your account, but Pro can also come as a license key (a gift, say). Type it into the box at the bottom of the Pro page to switch Pro on for that device; a monthly key covers a month and a yearly key a year. A Locus key is a short code checked by arithmetic inside the app itself — no server is involved, which is also why it works with no internet connection. That makes it a convenience, not a lock, and I'd rather be upfront about it than pretend otherwise. Please don't share or resell keys.

Your data

What Locus stores and sends is covered in full on the Privacy page. In short: local by default, and nothing but your account and what you choose to share leaves your device. Keep your own backups (Settings → Your data → Back up); that button exists so you don't have to take this on faith.

Availability and changes

Locus is a one-person project. It may have bugs, go down for a while, or change; features, including Pro extras, may be added or adjusted. If I ever have to shut it down I will say so in the app well beforehand, so you can take a backup.

No warranty, and limits on liability

Locus is provided as-is and as-available, without warranties of any kind, to the extent the law allows. To the extent the law allows, I am not liable for lost data, lost study time or indirect losses from using or being unable to use it, and my total liability for anything to do with Locus is limited to what you paid for Pro in the twelve months before the problem. Nothing here limits rights you have by law that can't be limited.

Changes to these terms

These terms can change as the app does; the date at the top says when. If a change matters, it is mentioned in the app. Carrying on using Locus after a change means you accept the current version.