What we keep about you, and what we don't.
Last updated October 22, 2026
On this page
Who is responsible
Sweat is run by one person, a sole proprietor doing business as Sweat. That person decides what Sweat collects and why, and answers for it. Addresses are at the end of this page.
The short version
Sweat keeps the least it can: your email if you make an account, which markets you watch and since when, positions you enter, your alert settings, your display preferences, a record of what you do on Sweat and any answers you give to short questions (in our own database), and the ordinary server logs any website keeps. None of it goes to Kalshi, Polymarket, Google, or X. There are no ads, no third-party trackers, and nothing is sold.
What we collect, and where it comes from
- What you give us. Your email address when you make an account, positions you type in, alerts you turn on, and messages you send us.
- What your browser holds. The market you watch, when you started, and preferences such as hiding posts on X live in your browser's storage on that device. They are not sent to us until you have an account and choose to keep them there.
- What we record automatically. Standard server logs: your IP address, browser type, the pages you requested, and when. We keep them for 30 days to keep the service secure, find abuse, and fix faults. No third-party analytics or advertising trackers run on Sweat. We do keep our own record of what you do on Sweat, in our own database (see How long we keep it).
- What others give us. With Google sign-in, only your email address. Nothing about you comes from Kalshi, Polymarket, or X. Position sync, when it exists, reads your open positions only after you connect it, and you can disconnect it at any time.
What we use it for
To run Sweat for you, to send the emails you asked for, to keep the service secure, and to meet legal obligations. Nothing else: no profiling, no advertising, no sale or rental of anything about you.
Never. Sweat never sells your data, never shows you ads, never emails you during the beta, and never sends your side or prices to analytics.
Without an account
You can look at any market and watch one without telling us anything. The market you watch and your preferences live in your browser only. Clear the site's data and they are gone. On our side there is the server log described above, which does not know who you are.
With an account
An account is an email address. We send a sign-in link to it; there is no password to store. Your markers move from the browser to the account so they go with you across devices.
We would email you only for a sign-in link you asked for, alerts you turned on, a receipt if you pay, a notice before a plan ends, and a notice of a material change to these pages. Never marketing you did not ask for. Every alert email carries a link that turns it off, and every email names the sender and a postal address.
Who we share it with
- Service providers, each for one job, each seeing the minimum that job needs and permitted to use your data only to do it for us: a hosting provider runs the server and the database; an email provider sends sign-in links, alerts, and receipts; a payment provider would handle payments, and card details never reach Sweat. If this list changes, this page changes with it.
- Legal requests. We comply with valid legal process. Where the law allows, we will tell you before we hand anything over.
- If the business changes hands, for example if Sweat becomes a company or is sold, your data goes with it under these same promises, and you will be told.
- Never to Kalshi, Polymarket, Google, X, advertisers, or data brokers.
The markets' records
Prices, news, and posts on X are recorded per market, not per person. They belong to the market and are visible to everyone who opens it. Watching a market adds nothing about you to that record.
Posts on X
We keep a post's words only while the post is still available on X, and remove them within X's deadline when a post is deleted, an account is protected, or X removes it. We store no images or media. X's own terms govern what X does with your use of X; ours govern only what Sweat does.
A picture in a post is never copied to Sweat: your browser loads it straight from X, with no referrer, so X sees your IP address and that your browser asked for that picture. If Sweat later shows a publisher's own thumbnail image beside a story, the same is true of that publisher.
Cookies and storage
Browser storage holds your markers and preferences, and an invite code for the open tab until you sign in. One cookie keeps you signed in. No third-party cookies, no third-party analytics, no advertising. Our own record of what you do here stays in our database and is never sold or shared, so a Do Not Track or Global Privacy Control signal has nothing further to opt out of.
How long we keep it
- Account data: while the account exists, then gone as soon as you delete it, with backups cleared within 30 days.
- We record what you do on Sweat (pages, alerts opened, errors, and your answers to short questions) in our own database to improve it. Never your side or size. Deleted with your account, otherwise kept 12 months.
- Server logs: 30 days.
- Receipts, if you ever pay: as long as tax law requires, 7 years.
- The markets' records: they are not about you and stay.
Your rights
Wherever you live, you can ask to see what we hold about you, correct it, delete it, get a copy of it, or object to a use of it. Email [contact email] and we answer within 30 days. Deleting your account from the account page does most of this without asking.
If you are in California, you also have the right to know what we collect and why, to delete it, to correct it, to opt out of sale or sharing (we do neither), and not to be treated differently for exercising these rights.
If you are in the UK or the European Economic Area, our legal bases are: performing our agreement with you (running Sweat and sending what you asked for), our legitimate interest in keeping the service secure, and your consent for anything optional. Sweat's servers may be outside your country; if they are, your data is transferred there under the safeguards the law requires. You may complain to your data-protection authority.
Children
Sweat is for adults. The markets it shows are for people 18 and over, and so is Sweat. We do not knowingly collect anything from anyone under 18; if you believe a minor has given us data, email us and we will delete it.
Security
Sweat uses reasonable measures for its size: connections are encrypted, access to data is limited to the operator, and sign-in needs no password we could lose. No method is perfect. If a breach affects you, we will tell you as the law requires, and sooner where we can.
Changes
When this page changes, the date at the top changes. If a change matters, account holders get an email and the site says so before it applies.
Requests from authorities
We comply with valid legal process and nothing less. Where the law allows, we tell the person affected before we hand anything over.
Contact
Sweat is run by one person, a sole proprietor doing business as Sweat. Sweat is independent and is not affiliated with, endorsed by, or connected to Kalshi, Polymarket, X, or Google. One person reads every message.
- Questions, privacy, legal notices, copyright and security
- [contact email]
- Something wrong on a page
- If something on a market's page looks wrong, send the market's link and the time shown beside it to [contact email].