Your data,
plainly.

Who we are

Hackney Games Ltd is a game development and publishing studio registered in England and Wales, company number 15850410, with its registered office at 71-75 Shelton Street, Covent Garden, London WC2H 9JQ. We are the data controller for everything described on this page.

What this policy covers

The KokoronoKi app for iPhone, whether you installed it from the App Store or as a TestFlight tester, and this website. Our web and Telegram games are separate services with their own notices, shown where you play them.

The KokoronoKi app

The app has no advertising or tracking code and no in-app purchases. It connects to two places: our own game server, for your account and your saved progress, and Amplitude, our analytics provider.

Your account: you sign in with Apple before you play. Apple gives us a sign-in token that contains an identifier for you that only Hackney Games receives. We do not request your name or email address, so Apple does not send them. Our server creates an account ID for you and stores it with that Apple identifier and the time the account was created. The app keeps a sign-in token in your iPhone’s Keychain so you stay signed in, and checks it with our server when it starts.

What Amplitude receives: your account ID, the game events you trigger (tutorial steps, chapters, level-ups, delivered tasks, in-game shop and gacha use, opened cards, energy and full-board moments), the screens you open, when a play session starts and ends, your device model, iOS version, app version, language and mobile carrier, a random identifier for the app on your device (Apple’s identifier for vendor) and one Amplitude generates, and your IP address, which Amplitude uses to estimate your country, region and city. The app does not use Apple’s advertising identifier and does not access your precise location, contacts, photos or anything outside the game.

We use this data only to understand how the game is played and to improve it. We never sell it, use it for advertising, or combine it with data from other companies. Amplitude processes it for us under Amplitude’s privacy notice.

Your progress (board, coins, tasks, story, tutorial and card collection) is saved on your iPhone, in the app’s own storage. While you are signed in, the app also copies it to our server about ten seconds after you play and whenever you leave the app, so it comes back when you sign in on a new or reinstalled iPhone. Deleting the app deletes the copy on your iPhone, not the one on our server. If you back up your iPhone to iCloud or a computer, that data travels with the backup. The backup belongs to you and your Apple account. We cannot see it and cannot restore it for you.

What Apple processes on its own

Apple runs the App Store and TestFlight as an independent data controller. When you download the app, Apple processes your Apple Account and device details under Apple’s privacy policy. If you have turned on “Share with App Developers” in your iPhone’s analytics settings, Apple may pass us anonymised crash reports; we cannot identify you from them.

If you test KokoronoKi through TestFlight, Apple collects your email address, name, device information, crash logs and any feedback you send, under Apple’s TestFlight privacy notice. Apple shares the feedback, screenshots and crash logs with us, linked to the email address we invited you with. We use them only to fix bugs and improve the game, and we never pass them to anyone else.

What we do process, and why

This is the complete list.

The site sets no cookies and loads no analytics or advertising scripts.

Sharing and where data is stored

We do not sell, rent or share personal data. Four companies handle data for us, each under its own terms: Apple for the App Store, TestFlight and Sign in with Apple, Amplitude for in-app analytics, Amazon Web Services for hosting our game server and this site, and Google for our email. Account data and saved progress are stored by Amazon Web Services in Frankfurt, Germany. Amplitude stores analytics data in the United States, and email may be stored on Google servers outside the United Kingdom, each under that company’s data transfer safeguards.

Children

KokoronoKi is not directed at children under 13, and we do not knowingly collect personal data from children. If you are a parent or guardian with a question, email us.

Your rights

Under UK data protection law you can ask to see the personal data we hold about you, have it corrected or deleted, restrict or object to how we use it, and receive a copy in a portable format. To delete your account, email us from any address and tell us roughly when you signed up; we delete the account, its saved progress and the analytics linked to it. Deleting the app stops all collection but does not delete your account. You can also stop the app using your Apple sign-in in your iPhone’s Settings: tap your name, then Sign-In & Security, then Sign in with Apple. We act on every request within one month.

You also have the right to complain to the Information Commissioner’s Office at ico.org.uk. We would appreciate the chance to help first.

Security

The app talks to our server and to Amplitude only over encrypted connections. Our server keeps no access logs; its error messages can include an account ID and are overwritten automatically, and email travels through Google’s encrypted service. No system is perfectly secure, and we will tell you if something goes wrong with data of yours.

If any of this changes

If a future version of KokoronoKi adds purchases, another provider or any other feature that processes personal data, we will update this page first. We will name every provider and what it receives, with links to its own policy, state how long we keep the data, ask for your consent where the law requires it, and mention the change in the App Store update notes.

Versions

• 11 October 2026. Added Sign in with Apple, an account on our own server and a server backup of your game progress, from app version 1.2; analytics are now linked to your account ID.
• 8 October 2026. Added gameplay analytics through Amplitude, from app version 1.2.
• 18 September 2026. First version.

Earlier versions are available on request.