DELTA is a dynasty fantasy football analytics tool. It collects the minimum needed to make the site work and to sync your settings across your devices. There are no ads, no trackers that follow you to other sites, and nothing is sold.
The short version
If you never sign in
Nothing about you is stored on any server. Your settings and watchlist live in your own browser.
If you sign in
Your email address, plus the settings, watchlist, and Sleeper league details you already had.
Sold or shared
Never.
Deleting it all
Email a request and the account and its data are removed.
What DELTA stores
On your device, whether or not you sign in
DELTA saves your preferences in your browser's local storage so the site remembers you between visits. That covers your league settings (league size, QB format, scoring format), your colour theme, your watchlist, your connected Sleeper and MyFantasyLeague (MFL) leagues, and a cached list of Sleeper player names so the roster view loads quickly. None of this leaves your device unless you sign in. Clearing your browser data removes it.
In your account, only if you sign in
Signing in is optional. DELTA works fully without an account; signing in exists so your setup follows you from a laptop to a phone. When you do sign in, the following is stored:
Your email address, used as the account identifier and to send sign-in links. If you sign in with Google, Google confirms your email address to DELTA. DELTA does not receive your Google password and cannot access your Gmail, contacts, Drive, or any other Google service.
Your league settings and theme — league size, QB format, scoring format, colour theme.
Your watchlist — the names of the NFL and college players you have starred.
Your Sleeper league connection — league ID, league name, season, your roster ID and team name, and your Sleeper user ID and username. This is the information DELTA needs to show your roster.
Your MyFantasyLeague (MFL) league connection — league ID, league name, season, and your team's number and name. DELTA has no MFL username or password to store.
There is no profile, no display name, and no password. DELTA does not ask for your real name, address, phone number, date of birth, or any payment information, because it has no use for them.
Analytics
DELTA uses GoatCounter to count page views. It is a privacy-focused analytics service that does not set cookies and does not build a profile of you across sites. It records aggregate counts, not individual people.
Who else is involved
DELTA is a small independent project and relies on a few outside services. Each one sees only what it needs to do its job.
Supabase
Stores accounts and synced data, and runs the small relay DELTA uses to read MFL leagues. Hosted in the United States (US West).
Google
Only if you choose "Continue with Google". Confirms your email address.
GitHub Pages
Serves the site itself.
GoatCounter
Aggregate page-view counts.
Sleeper
When you connect a league, your browser contacts Sleeper's public API directly, so Sleeper receives that request.
MyFantasyLeague
MFL does not let other websites read its data from your browser, so when you connect an MFL league, DELTA's relay asks MFL for that league's public information and passes the answer straight back. MFL sees the request come from DELTA, not from you. The relay never asks for your MFL username or password, keeps MFL's answers for a few minutes so it is not asking repeatedly, and counts requests per connection for one minute to stop abuse. It stores nothing about you. Like any web service, Supabase may keep standard request logs.
Player statistics, contract data, and market values shown in DELTA are compiled ahead of time and served as static files from the site. Viewing them does not send any information about you to those data sources.
What DELTA does not do
No selling, renting, or trading of personal information, to anyone, ever.
No advertising and no advertising trackers.
No third-party analytics that follow you across the web.
No reading of your email, contacts, files, or anything else in your Google account.
No marketing emails. The only emails DELTA sends are sign-in links you asked for.
How long it is kept
Account data is kept for as long as the account exists. Delete the account and the associated settings, watchlist, and league records are deleted with it. Data stored in your browser stays until you clear it or sign out and clear it yourself.
Your choices
Use DELTA without an account. Everything except cross-device sync works signed out.
Sign out at any time. Signing out does not delete anything; your local settings and watchlist stay on that device.
Get a copy of your data, correct it, or delete it. Email the address below and it will be handled.
Depending on where you live, you may have additional rights over your personal information, including the right to access it, correct it, delete it, or object to its use. DELTA honours these requests regardless of where you live — email is the way to make one.
Children
DELTA is not directed at children under 13 and accounts should not be created by them. If you believe a child under 13 has created an account, email the address below and it will be removed.
Security
Accounts are protected by database-level access rules, so one account cannot read another's data. Traffic is encrypted in transit. No system is perfect, and DELTA is a personal project rather than a company with a security team, so please do not store anything in it that you would be harmed by losing.
Changes
If this policy changes in a way that meaningfully affects what is collected or how it is used, the date at the top will change and the change will be noted on the site.