Privacy by architecture, not by policy
Most edtech privacy pages describe what the company promises not to do with student data. This page is shorter, because the architecture removes the question: the tools on lans.cloud run entirely in the browser, and the site has no server code that can receive student data. Class lists, seating rules, spelling words, scores, and reading passages are processed on the teacher's device and stored, at most, in that browser's local storage. A promise can be broken; a missing endpoint cannot.
The review checklist
Ads and the classroom
The site is ad-supported — that is what keeps it free — but the founding rule is that ads never appear on a projected screen. Every presentation-style tool has a one-click fullscreen mode with zero ads, and the embeddable versions (for Google Sites and class pages) contain no ads either. Ads exist only on the regular browsing pages, in clearly separated slots.
Embedding in class websites
The wheel, timer, name picker, scoreboard, noise meter, exam clock and several others can be embedded with a copy-paste snippet from the bottom of their pages — ad-free inside the embed, no scripts beyond the tool itself.
Start here
The full classroom set is at lans.cloud/classroom-tools, and there's a printable one-page cheat sheet for staff rooms. Questions this page doesn't answer: use the feedback button on any tool page (add your email for a reply) — it goes directly to the developer, and answers typically come within a day. More background on who builds this and why: the about page.