Our promises
LatticeMLS shows no ads, does no tracking and never sells or shares your data. Anyone can read the lessons and guides and search the site without an account. A free account opens the practice tools and keeps your progress on any device.
- An account is your email address and, if you add one, a passkey. We don't ask for your name.
- We email you only to sign you in and, if you turn it on, a weekly review reminder. No newsletters and no marketing.
- Your account keeps your plan, answers, review schedule, skills and lab history. Only you can see them.
- We improve the site with totals that can't be traced to anyone, such as how often a question is missed or how many people opened a page.
- You can delete your account and everything in it at any time.
Who we are
LatticeMLS is published by Alexan Berberian. Write to hello@latticemls.org with any question about this policy.
What we collect and why
Scroll sideways to see all columns
| Data | Why | Kept for |
|---|---|---|
| Your email address and the public half of any passkey | To sign you in | Until you delete the account |
| Your plan, saved lessons, reading place, answers and lab history, with how sure you were, the hints you opened and the time taken | To schedule your reviews and show your progress | Until you delete the account |
| Totals per question and activity, with no link to any account | To find explanations that need work | As long as the question is used |
| Anonymous practice exam statistics, when Share anonymous question statistics is on | To estimate how hard each question is and find questions that may be wrong | Indefinitely |
| Your answers at the Microscope and in the practice exam | To grade your work on our server, so the answer key never reaches your browser early | About a day, under a code that says nothing about you |
| Cookieless traffic statistics | To understand how the site is used and how fast it is | 6 months |
| Daily counts of pages viewed and tools used, with country, type of screen and the site that sent the visit, and nothing that could identify you | To see which parts of the site help learners | 13 months |
| The type of error and page when something breaks | To find and fix problems | Up to 7 days |
| Emails you send us | To answer you | Until the matter is closed |
Your study history holds your choices and numbers. Anything you type in your own words stays out of it.
Your account
An account is optional. Cloudflare sends the sign-in emails for us, and the account database is in eastern North America.
The first time you sign in, you choose whether to add the progress you made before signing in. Signing out removes your progress from that browser, and everything saved to your account stays there.
Cookies
LatticeMLS uses only the cookies that keep you signed in. There are no advertising or tracking cookies. Without an account, your browser remembers your progress so you can pick up where you left off.
Service providers
Cloudflare hosts the site, keeps the account database, sends the sign-in emails and provides the traffic statistics and error logs. No other company receives anything about your visit.
Your choices
- Delete account on your account page removes the account and everything in it at once.
- For a copy of everything we hold about you, write to hello@latticemls.org.
- Browser extensions that stop analytics scripts stop the traffic statistics too. The site works the same either way.
Security
The site is served over HTTPS only. Sign-in uses emailed links and passkeys, so there is no password to steal.
Changes to this policy
Each version of this policy is dated, and every change is recorded on the Content updates page. This version is dated September 27, 2026.