Contact

Doubled is made and run by one person. Email is the only channel, and it is read by a human rather than a queue.

What to include

A puzzle looks wrong

Send the puzzle's date. If the answer you had in mind fits the picture as well as the published one does, say what it was — near-misses are how the wording of a puzzle gets fixed for the next time it comes round.

Something is broken

Say what you were doing, what happened instead, and which platform you were on: browser or iOS. The version number in the footer of the home screen names the exact build you were running, and quoting it saves a round of questions.

Your account or your data

Email from the address the account is registered to. You can ask what is stored about you, ask for it to be corrected, or ask for the account and its play history to be deleted outright. Deletion is permanent and takes the streaks with it. See the privacy policy for what is held and why.

Groups

Group admins can rename, remove members, and hand over admin from inside the app. Get in touch if a group has been left without an active admin, or if someone needs removing and there is no one able to do it.

Premium

Purchases are handled by the App Store, so refunds go through Apple rather than through Doubled — Apple holds the payment and is the only party that can return it. If a purchase completed but premium did not unlock, that part is on this end: email the store receipt and it can be sorted out.

Press, partnerships, and advertising

Same address. Mention what you are after in the subject line.

What this address is not for

Hints. Part of the point of a daily puzzle is being stuck on it for a while. The how to play page explains the structure and works through examples, which is the closest thing to a hint on offer.