Privacy policy

Oddsworth is made and run by Ross Harrison, an independent developer in the UK ("we"). Under UK data protection law, we're the controller of your personal data: the one who decides how it's used. For anything about your data, email support@oddsworth.co.uk.

Oddsworth never places bets and never connects to your bookie. It builds slips that you copy into your own bookie, so it never sees your betting account, bank or card details.

When you sign in, Oddsworth keeps this on its server, and only you can see it:

Your sign-in

Your email address: the one you type for a sign-in code, or the one Apple shares if you use Sign in with Apple (which can be a private relay address Apple makes for you). We don't ask Apple for your name. The sign-in service also records when you signed in and the IP address used.

Why: To sign you in and keep your account yours.

Your slips

For each slip you save: its legs, odds, chances, stake, way of betting, when you saved it and the results you mark.

Why: So you can see your slips, and so the Record tab can show your profit and loss and how the app's chances compared with what landed.

Your settings and limits

Your monthly budget, stake limit, when any break you've taken ends, and when you allowed Claude.

Why: So the guardrails work: the budget, the stake limit, breaks and the pause after a losing day.

When you asked Claude

The time of each request to Claude. Not what you asked.

Why: To hold each account to 30 requests a day.

Technical logs

Our server provider keeps short-lived logs, such as errors, request details like IP addresses, and how much of Claude each request used. They don't contain what you asked Claude or your slips.

Why: To keep Oddsworth running and secure, and to fix problems.

• Your signed-in session, in the iPhone's Keychain.
• The slip you're building and Claude's last answer, so they're still there when you come back. Signing out clears them.
• Face ID, if you turn on the lock. iOS handles it entirely: the app only learns whether it worked, never anything about your face.
• Slip images you share and slips you copy are made on your phone, and only go where you send them.

Your name, phone number, location, contacts, photos, advertising ID, bookie accounts, bank or card details. The app has no ads, analytics or tracking tools in it, and we don't sell or share your data for advertising.

Claude, on the Build tab, is optional. It's an AI model made by Anthropic. Nothing is sent to Anthropic until you allow it, on a screen that explains what's sent. After that, each request sends:

• what you type into Ask Claude
• today's fixtures and prices, with the app's chances
• your Build setup: the risk tier, number of legs and league

It never sends your email address, your saved slips, your results or your budget, and nothing that says who you are. Anthropic handles requests under its commercial terms: it doesn't use them to train its models, and keeps them only for a limited time. You can turn Claude off in Settings whenever you like.

A few companies run parts of Oddsworth for us. They only use your data to do that job, under contracts that require them to protect it.

Supabase

Stores your account, slips and settings in its London data centre, and runs Oddsworth's server.

Resend

Sends the emails with your sign-in codes, so it sees your email address.

Anthropic

Runs Claude. It only receives anything if you've allowed Claude (see above).

Apple

Sign in with Apple, the App Store and TestFlight, and our support inbox (iCloud Mail). If you've chosen in iOS Settings to share analytics with app developers, Apple may also pass us crash reports, which don't say who you are.

Expo

Delivers app updates. When the app checks for one, Expo sees the app's version, a random ID for this install of the app and your IP address.

Cloudflare

Serves this website.

Some of them are based in the United States. Where your data leaves the UK, it's covered by the safeguards UK law requires, such as the UK–US data bridge or approved data transfer clauses. We don't share your data with anyone else unless the law requires it.

UK data protection law asks us to say which legal basis we rely on:

• To provide the app you signed up for: your sign-in, slips, settings and limits, and the emails with your sign-in codes.
• Your consent: sending requests to Claude. You can withdraw it in Settings at any time.
• Our legitimate interest in keeping Oddsworth secure and working: sign-in records, the daily Claude limit, technical logs and update checks.

Everything in your account stays until you delete it. Settings → Delete account removes your sign-in, slips, settings and Claude request times from our database straight away. Copies in our providers' routine backups and logs expire on their own, within a few weeks.

We keep emails you send us only as long as we need them to help you.

You can ask to see the data we hold about you, get a copy of it, correct it or delete it, and you can object to or limit how we use it. Email support@oddsworth.co.uk and we'll reply within a month. The quickest way to delete everything is Settings → Delete account in the app.

If you're unhappy with how we've handled your data, you can complain to the Information Commissioner's Office at ico.org.uk or on 0303 123 1113. We'd appreciate the chance to put it right first.

• Everything between the app and our server is encrypted (HTTPS).
• The database itself checks that each account can only read and change its own data.
• Your session is kept in the iPhone's Keychain, and you can lock the app with Face ID.

No system is perfectly secure. If something went wrong that put your data at risk, we'd tell you and the ICO as the law requires.

Oddsworth is for over-18s only. We don't knowingly hold data about anyone under 18, and if we find we do, we delete the account.

oddsworth.co.uk uses no cookies, analytics or tracking, and its fonts come from this site rather than a third party. Cloudflare, which serves it, keeps standard logs such as IP addresses to protect the site.

If you email us to hear when the app launches, we keep your email address only to tell you, and delete it afterwards, or sooner if you ask.

If we change this policy, the date at the top changes too. If a change affects what we collect or who handles it, we'll make that clear in the app. Questions about any of this: support@oddsworth.co.uk.