Privacy
Last updated 12 November 2026
Sixty Sums is a daily mental-maths game run by Mike Hayden in Limerick, Ireland. This notice explains, in plain language, what we collect and why. Questions or requests: hello@sixtysums.com.
What we collect
| What | Why | Public? |
|---|---|---|
| The name and country you type in | To show you on the leaderboards | Yes |
| Your sprint results and trap answers | Leaderboards, rankings, "% got it right" and checking scores are genuine | Scores yes; answer-by-answer detail no |
| A random ID stored on your device | Keeps your scores and streak together without an account. It isn't linked to your identity. | No (only a scrambled version is used on boards) |
| Your email, only if you choose to give it | To tell you when new features launch | Never |
| Usage analytics, only if you click Allow | To see which parts of the game work and which don't | No |
What we don't do
- We don't sell or rent your data, ever.
- We don't need an account, a password or your real name.
- We don't show ads, and there are no ad trackers unless we tell you here first and ask.
Who helps us run it
- Vercel hosts the website.
- Supabase stores scores and sign-ups, on servers in Ireland.
- PostHog provides analytics, hosted in the EU, and only when you allow it.
Legal basis
Running the game and its leaderboards is the service you ask for when you play. Analytics and emails are based on your consent, which you can withdraw at any time.
How long we keep it
Scores are kept while the game runs so all-time boards and streaks work. Email sign-ups are kept until you ask us to remove them or the feature launches and you unsubscribe.
Children
Children under 16 should play with a parent, use a first name or nickname, and not enter an email address.
Your rights
You can ask to see, correct or delete your data, or object to how it's used, by emailing hello@sixtysums.com. Tell us the name you play under so we can find your scores. You can also complain to Ireland's Data Protection Commission at dataprotection.ie.
Clearing your data on this device
Clearing this site's data in your browser removes your device ID and local scores. Your past scores stay on the boards under your name unless you ask us to delete them.