Privacy
Last updated 24 September 2026
Plankle is a small daily puzzle. There is no account to create, no email address to give, and nothing to log in to. This page describes everything the site keeps or measures, in plain terms.
The game saves a few things in your browser's local storage. This data stays on your device. It is not transmitted to us, and we have no way to read it.
Clearing your browser's data for this site erases all of it, including your streak. Because it is stored per browser, your record on your phone and your record on your computer are separate and do not add up.
We use Google Analytics 4 to count how many people play and which parts of the game get used — for example how often a puzzle is solved, and whether the share buttons are worth keeping.
Whether you are asked first depends on where you appear to be. If your browser looks like it is in the United Kingdom or the European Economic Area, a banner asks before anything is measured, and nothing is measured unless you press Accept. Everywhere else, analytics is switched on when the page loads and no banner appears.
Two independent signals decide that, and either one on its own is enough to hold measurement back: the time zone your browser reports, which the site reads on your device and never sends anywhere, and the country Google's own tag works out from your IP address. If either points to the UK or the EEA, measurement stays off until you turn it on. When neither can be read — some privacy-hardened browsers report no usable time zone — the site asks rather than assumes. If your browser sends a Global Privacy Control signal, that is treated as a no and analytics is never switched on by default.
When it does run, Google Analytics records things like the pages you visit, roughly where in the world you are, your device type and browser, and the in-game events listed above. It sets cookies to recognise a returning browser. It does not receive your name or email, because the site never asks for them, and Google Analytics 4 does not log or store IP addresses.
Google acts as our data processor for this. Their handling of it is described in Google's privacy policy and in Google's privacy and terms for businesses.
Changing your mind. The button below switches analytics on or off for this browser, whether or not you were ever shown the banner. Your choice is stored on this device and overrides the regional default in both directions, so it survives a change of country or time zone. Clearing this site's data resets it. You can also install Google's opt-out browser add-on, which blocks Analytics on every site.
Two things are loaded from other people's servers to make the page work. Requesting a file from a server necessarily tells that server your IP address and browser, which is true of any website.
Neither of these sets a cookie on this site.
The share buttons do not post anything by themselves. They open the network you picked — X, Bluesky, Mastodon or Threads — with a message prepared, and nothing is published unless you go on to post it there. Once you leave for one of those sites, their privacy policy applies, not this one.
The Mastodon button goes via toot.kytta.dev, a free redirect service that asks which Mastodon server you are on, since a website cannot know that. It sees the message you are about to post.
Plankle is suitable for all ages, but it is not directed at children and we do not knowingly collect any information from children.
Because the site holds no account and stores nothing about you on our servers, there is normally no personal data for us to hand over or delete on request. If analytics ran for you and you want the associated data removed, write to us at the address on the contact page and we will ask Google to delete it.
If this changes, the date at the top of the page changes with it. Substantial changes — such as introducing advertising — will be announced on the game itself before they take effect.
Questions about any of this go to the address on the contact page.