Support
We answer every email within two business days. If you're stuck on a puzzle, try the checklist below first — it fixes 90% of reports before they hit our inbox.
Get in touch
- General questions: hello@sudokuacademy.org
- Billing & subscriptions: billing@sudokuacademy.org
- Privacy / data requests: privacy@sudokuacademy.org
- Bug report: use the "Report puzzle" thumbs-down on any puzzle page, or email us at bugs@sudokuacademy.org
Frequently asked
Why is a hint telling me to remove a candidate I already erased?
We recently shipped a fix: the hint solver now respects the pencil marks you've already narrowed. If you're still seeing this, make sure you're on the latest version (hard-refresh: Cmd/Ctrl + Shift + R). If it persists, please report the puzzle via the thumbs-down so we can inspect it.
I entered a wrong digit and the hint is confusing.
Run Check My Work from the numpad — wrong cells turn red. Tap "Clear Wrong" (one undo restores everything) or fix them manually, then retry the hint.
How do I cancel my Premium subscription?
Go to Subscription and click "Manage in Stripe". You can cancel anytime; access continues through your paid period. We do not offer prorated refunds for partial months.
I lost my streak — can you restore it?
Streaks reset if you miss a calendar day (UTC). We generally don't restore streaks manually, but if the loss was due to a server outage on our end, email hello@sudokuacademy.org with your username and we'll check the logs.
I forgot my password.
Use the Forgot Password page. If you registered with a username only (no email), sign in with Google or Apple instead, or email us to help recover the account.
How do I delete my account?
Sign in, open Dashboard, scroll to the "Danger Zone" section at the bottom, and follow the type-DELETE confirmation. Deletion is immediate and permanent — we cannot recover the account afterward.
This puzzle is unsolvable / has multiple solutions.
Every algorithmic puzzle on Sudoku Academy is guaranteed solvable by pure logic (no guessing). If you find a counterexample, please tap the thumbs-down on the puzzle page — that flags it for review and takes it out of rotation while we inspect it.
I'm on the App Store version and Premium isn't unlocking.
The mobile app forwards subscription state from the web. Make sure you're signed in with the same account you used to subscribe. If Premium still doesn't appear after 60 seconds, pull-to-refresh, then contact billing support.
Community
Join our Discord for daily-challenge discussions, technique walkthroughs, and puzzle debates: discord.gg/sudokuacademy