Cookie policy

The short version

DeviceBench sets one cookie of its own, db_consent, which only records the choice you made in the cookie notice. Google Analytics sets two more while Analytics is on. There are no advertising cookies and no login cookies, because the site has no accounts, no ads and no server that receives anything of yours. The notice shows once, in the bottom-right corner, with two categories: Essential (always on) and Analytics, which you can switch off.

The consent cookie

Your answer in the cookie notice is stored in the cookie db_consent (first-party, 180 days, never sent anywhere but this site) and mirrored in your browser's local storage under db-consent, so the notice does not come back on every visit. If you leave the notice unanswered it closes itself after about twenty seconds and records what is already running: Essential on, as always, and Analytics on. Nothing new starts at that moment. In the EEA, the United Kingdom and Switzerland, Google Analytics stays cookieless until you accept Analytics. Your privacy choices in the footer of every page reopens the preferences at any time, and Decline all or Accept all there replaces the earlier choice.

Analytics

We use two analytics services to learn which pages and features help. Plausible Analytics counts page views and a few coarse events without cookies. Google Analytics 4 measures the same page views and events and sets the two cookies listed below. We run Google Analytics with Google signals and ad personalization turned off and do not use it for advertising. In the EEA, the United Kingdom and Switzerland it runs without cookies until you accept Analytics. Turn Analytics off in the cookie preferences and neither service counts your visits, and the Google Analytics cookies are removed.

• _ga (Analytics, 2 years). Google Analytics: a random identifier that lets us tell a returning browser from a new one when counting visits.
• _ga_T3JB8E76J2 (Analytics, 2 years). Google Analytics: keeps the state of the current visit.

What the site does store in your browser

Besides the consent record and the analytics cookies above, two preferences, both set only by your own action and readable only by this site, live in your browser's local storage:

• Theme. When you press the light/dark toggle, the site remembers your choice so the next page does not flash the wrong colours. Until you press it, the site follows your system setting and stores nothing.
• Companion connection. When you click Connect in the lab, it remembers that you have connected the local companion before, so it can reconnect on your next visit without asking again.

Neither value identifies you, neither is sent anywhere, and both are strictly necessary for the feature you turned on. They therefore need no consent. You can remove them at any time by clearing site data for devicebench.io in your browser.

Model files your browser caches

Running a browser model for the first time downloads its weights from the publisher (Hugging Face for WebGPU models, Google for Chrome's built-in model). Your browser keeps those files in its cache so the model does not download twice. That cache holds model weights, not anything about you, and clears with your browser's site data.

Third parties

Every page loads two third-party analytics scripts, Plausible's from plausible.io and Google Analytics from googletagmanager.com, unless you switched Analytics off in the cookie notice. Plausible sets no cookies; Google Analytics sets the two cookies listed above. The lab additionally fetches the WebLLM library from the jsDelivr CDN (esm.run) the first time you run a WebGPU model, and only then; it is a code library, sets no cookies and is cached like any other file. No other third-party scripts, embeds, fonts or pixels are loaded on devicebench.io.

If this changes

If DeviceBench ever adds something else that needs consent, this page will say so, it will appear as a new category in the cookie notice before that thing loads, and the privacy policy will be updated in the same release. The date at the top reflects the last material change.

Contact

DeviceBench is a product name of, and is operated by, Elowin Labs LLC. Questions about this policy: hello@devicebench.io.