Support
Last updated: 19 October 2026
A question, a problem, a case that won't crack? Write to us, in English or French.
Our address
paul.nadin.pro@gmail.comFor a quick answer, please include
- your iPhone model and iOS version;
- the app version (at the bottom of the app settings);
- the case file and case number concerned;
- a screenshot if possible.
Quick help
How do I get my badges and case files back on a new iPhone?
Open the shop or the app settings and tap “Restore purchases”, signed in with the same Apple Account you used to buy them. Hint packs, used up as you play, cannot be restored.
A purchase does not show up in the app, what can I do?
Check your internet connection, then tap “Restore purchases” in the shop. If a badge, a case file or a hint pack is still missing, email us at paul.nadin.pro@gmail.com with the date of the purchase (it is on the receipt sent by Apple): we will help you.
How do I request a refund?
Payments are handled by Apple: make your request at reportaproblem.apple.com.
My progress is gone, what can I do?
Your progress and remaining hints are stored only on your phone: deleting the app erases them, and they do not sync between devices. They can come back if you restore an iPhone backup that contains them. Your badges and case files can always be restored with “Restore purchases”.
I think a puzzle has two solutions.
Every puzzle is checked by our solver, and your grid is accepted as soon as it respects every rule and every clue. “Check my grid” shows conflicts. If you think you found a mistake, send us the case file and case number: we check every report.
How do I turn the daily reminder on or off?
In the app settings, under Daily reminder, or in iPhone Settings > Notifications > Capodoku.
How do I see the rules again?
In the app settings, under Game, tap “Rules of the game”.
How do I report an offensive or inappropriate ad?
In the app settings, under Help, tap “Report an ad”: a pre-filled email opens, describe the ad (brand, image, text). You can also write to paul.nadin.pro@gmail.com. We have it blocked with our ad network.