Privacy Policy

Last updated 10 October 2026

Who we are

STACKD is operated under ABN 54122728362, Brisbane, Queensland, Australia (“we”, “us”). This policy explains what the STACKD app collects, who can see it, who we share it with, and how to ask us to delete it. You can contact us at stackd.help@gmail.com.

What we collect

STACKD is designed to collect as little as possible:

• A random player ID, created on your device the first time you play. It isn't your name, email or any other real-world identifier — it's a random string that keeps your results, coins, purchases and unlocked themes attached to you. If you delete the app, the ID may be lost on your side and we can't restore it for you.
• The display name you type. We ask for a name so your score can appear on the leaderboard. Please use a nickname rather than your full real name, because other people can see it (see “Where your name and results appear” below).
• Your results. For each puzzle you finish: the puzzle number, your total score, the four words you played and their scores, your current streak, and whether you used a coin-paid help (an extra hint, a shuffle or a Word Jackpot).
• Private group details, if you create or join a group: the group name you type and the join code.
• Purchases, if you buy coins or themes: which product, when, the store's transaction number, and whether it was later refunded. The payment is taken by Apple or Google — we never see or store your card details. Our purchase provider, RevenueCat, also receives your player ID and purchase records, plus technical details such as your device type, a device identifier (on iPhone, the identifier for vendor) and IP address.
• Technical data. When the app connects to our servers (to post a score, check a purchase, load a leaderboard or check for an app update), our hosting provider sees your IP address and device type in its server logs.
• Messages you send us, such as support emails, and anything you put in them.

We do not collect your contacts, photos, precise location or advertising identifier. STACKD shows no third-party advertising and has no analytics or crash-reporting tools of its own. Our purchase provider (RevenueCat) and, on Android, Google’s Play Games service may collect technical and diagnostic information about how the app is working, as described in their privacy policies. The optional daily reminder is a notification scheduled on your own device; nothing about it is sent to us.

Where your name and results appear

STACKD is a shared daily puzzle, so results are public by default. Unless you turn the switch off:

• your display name, daily score, streak and — once that puzzle day has ended — the four words you played can be seen by all STACKD players in the in-app Public Top 10 and Yesterday's Results;
• the same information is held by our public leaderboard service, which is not password protected, so anyone who knows how can read the full list, not only the top 10;
• our bot posts the daily top 10 (names, scores, streaks and words) and a weekly top 10 (names and total scores) to STACKD's public Discord server. Discord is a separate service with its own privacy policy, and messages stay in that server's history.

How to turn it off: open the Leaderboard screen, choose Public Top 10, and set “Discord Leaderboard” to Off. After that, new results are not sent to the public leaderboard or Discord, so you also won't appear in the in-app Top 10. Results that were already shared stay visible until they are deleted; to have them removed, see “Your choices and rights” below.

Private groups. If you join a private group, your results are shown to that group's members. In current versions of the app, turning the switch off also keeps your group results off the public leaderboard and Discord; with the switch on, group results are counted on the public leaderboard too. In older versions of the app, group results can appear on the public leaderboard whatever the switch says — please update the app. Anyone with a group's join code can see that group's names, scores and (for past days) words, so share a code only with people you trust.

Apple Game Center and Google Play Games. Separately, the app submits your daily score to the Game Center (iPhone) or Google Play Games (Android) “Daily Score” leaderboard. That leaderboard is run by Apple or Google, shows the profile name you use there, and is not controlled by the switch above. You can manage it in your Game Center or Play Games settings.

Why we use it

• To run the game: keep your results, streak, purchases and unlocked themes working.
• To run leaderboards and a community: show the rankings described above. You can switch the public sharing off.
• To prevent fraud and abuse: for example counting refunds, withholding purchased items on accounts with repeated refunds or chargebacks, and removing offensive names or cheated scores.
• To answer you, and to meet legal and tax record-keeping duties.

We do not sell your information and we do not use it for advertising or tracking.

Who we share it with

• Apple and Google — take payments, provide Game Center and Play Games, and run the app stores; see their own privacy policies.
• RevenueCat — verifies purchases on our behalf so we can credit them reliably; see RevenueCat's privacy policy.
• Discord — receives what our bot posts to the public STACKD server, as described above; see Discord's privacy policy.
• Render hosts our game servers (including an older server still used by earlier versions of the app), and Netlify hosts this website.
• Google Fonts supplies the app's typefaces, so Google receives your IP address and device details when the app starts.
• Authorities or advisers, where the law requires it.

Overseas transfers

These providers are mainly in the United States, so your information may be handled outside Australia and, if you live there, outside the UK or European Economic Area.

How long we keep it

We currently keep leaderboard entries, wallet records and purchase records for as long as the game runs, unless you ask us to delete them. Records of purchases and refunds may be kept longer where needed for tax, fraud-prevention or legal reasons. Our hosting provider keeps server logs for a limited period. Messages already posted in Discord stay in that server until they are removed.

Your choices and rights

You can ask us to show you, correct or delete the information we hold about you. In the app, open Menu → Help & about to see your Player ID, then email stackd.help@gmail.com with that ID (we need it to find your records; without it we can only look up a display name, which isn't unique). We reply within 30 days.

When you ask for deletion we will remove your scores, display name, group entries, wallet and theme records from our servers (including the older server), ask RevenueCat to delete its customer record, and remove Discord posts about you where we are able to. We may have to keep limited records — for example that a purchase and refund took place — for tax, fraud-prevention or legal reasons. We cannot delete data held by Apple, Google or Discord themselves.

If you are not satisfied you can complain to us, or to the Office of the Australian Information Commissioner (oaic.gov.au) or your local data protection authority.

Children

STACKD is not for children under 13 (or the higher minimum age in your country) and we do not knowingly collect their information. If you are under 18, please use STACKD with a parent or guardian's permission, especially before making purchases or choosing a name. If you believe a child under 13 has given us a name or other information, email us and we will delete it.

Security

The app talks to our servers over encrypted connections. No online service is perfectly secure, so please don't put sensitive information in your display name, group name or emails.

Changes to this policy

If this policy changes, the “last updated” date above will change and, for material changes, we'll flag it in the app.