Privacy
Last updated: October 26, 2026
You can play without an account. If you choose to sign in with Google, we keep only your email address, name and profile photo from it. We never record your voice.
Who is responsible
Word Skyline is run by Yuxin Dai, an individual based in China, who is responsible for your personal data (the “controller”). Write to support@wordskyline.com with any question about it.
What we store
- A random learner ID kept in one cookie that only our server can read. It lets you continue where you left off.
- If you sign in with Google: your Google account ID, email address, name and the address of your profile photo, so you can continue on any device. We do not get your password or any other data from your Google account.
- If you buy Plus: your plan, its status and renewal date. Payment details are handled by Creem, our merchant of record; we never see your card.
- Your learning records: which words you met, your answers, whether you used a hint, and when. We use them to schedule reviews and show your progress.
- Your stars and notes: the words you star and the notes you write on them. Only you can see them.
- The month and year you were born, from the one question we ask everyone.
- Your name on boards, if you choose one, and whether strangers may see it with your photo.
- Your time zone and browser language, so that "today" means your today.
- Basic usage events, such as starting or finishing a round. These events never include personal details.
- Feedback you choose to send, for example a report about a word.
- Error reports when the app crashes in your browser: the error message, the page address without any query, and the app version. They are deleted after 30 days.
Age
Word Skyline is for people aged 16 and over. We ask everyone once for the month and year they were born, and keep only that, to apply the age limit and to know when a parent or guardian must agree to a purchase.
If someone tells us they are under 16, we delete what their browser had played at once. If you think a child under 16 is using Word Skyline, write to us and we will delete their data.
What other players see
In friends’ challenges and groups, people see the name you chose. On public boards (today’s top 50, leagues and ranked matches), players who do not know you see only your first letter and a blurred picture, unless you choose in Settings to show your name and Google photo.
Your Google photo is passed on by our own server, so other players’ browsers never contact Google for it. Hiding it again stops the old address from working.
What we keep on your device
One cookie that holds your session, which the app needs to work. In your browser’s storage: your settings and language, a round in progress, your privacy choices, and, with your consent, a random id for usage statistics. Google sets its own cookies when you use its sign-in.
Your privacy choices
Usage statistics and Google’s quick sign-in prompt are optional. In the EU, the EEA, the UK and Switzerland we ask first and keep both off until you agree; elsewhere they are on until you turn them off. You can change both at any time in Settings, under Privacy choices.
Why we may use your data
To give you the service you asked for (your session, learning records, progress, account and Plus): this is needed for our agreement with you.
Usage statistics and the quick sign-in prompt: your consent, which you can withdraw at any time.
Error reports, security and keeping boards fair: our legitimate interest in a service that works and is fair to everyone.
Payment and tax records: a legal obligation, kept by Creem as merchant of record.
How long we keep it
The raw moves of each round are deleted 30 days after the round ends. Learning records are kept so your reviews and progress keep working. Usage events are deleted after 180 days.
If you joined through a research study invitation, the study's information sheet also applies, and the moves of your rounds are kept for the study.
Download or delete your data
In Settings you can download all your data or delete it. Deleting removes your progress and your account on every device and cannot be undone. To continue on another device, sign in with the same Google account.
Who we share it with
We do not sell your data or use it for advertising. It is stored and processed by our hosting provider, Cloudflare, to run the service. Google confirms who you are when you sign in, and Creem processes payments for Plus.
Where your data is processed
Cloudflare runs our servers, database and network; our database is stored in the Asia-Pacific region. Google confirms who you are when you sign in. Creem handles payments and is itself responsible for the payment details it collects.
Your data may therefore be processed outside your country, including in the United States and Asia. Where the law requires it, these providers protect it with the European Commission’s standard contractual clauses or equivalent safeguards.
Your rights
You can ask to see, correct, download or delete your data, to restrict or object to how we use it, and you can withdraw any consent. Most of this you can do yourself in Settings; for anything else, write to support@wordskyline.com. We answer within one month.
If you live in the EU, the EEA, the UK or Switzerland, you can also complain to your data protection authority.
No decision with legal or similarly significant effects is made about you automatically. Choosing which words come back for review is automatic, but it only shapes your practice.
Changes
If we change this policy in a way that matters to you, we will tell you in the app.