Thanks for playing. If you’re stuck, something’s broken, or you’ve got a question, this page is the place to start.
Email: support@otfdp.com
We try to reply within 2 business days. To help us help you faster, include:
In-progress puzzles save automatically. Tap Packs → (your pack) → (your puzzle) to return to the picross selector — any picrosses you’d started will still be there.
Completed CBNs live in the Trophy Room (the trophy icon on the title screen).
Energy refills over real time — you can check your remaining time by tapping the energy counter at the top. If your device’s clock is wrong, regeneration timing can look off; fixing the clock will bring it back in sync on the next launch.
Open Settings → Restore Purchases. The store sometimes takes a moment to confirm purchases with our servers; restore re-runs the check.
If restore doesn’t help, email us with your purchase receipt and we’ll investigate.
Color by Nonogram uses an anonymous account that’s tied to your device. Reinstalling on the same device generally restores your progress; switching devices does not, because we don’t (yet) have a sign-in option to link the same account across phones. Account linking is on the roadmap.
If your data should be there but isn’t, email us with the rough date you last played and we’ll see if we can find your account on the backend.
Free-fill state saves per puzzle. To find it again, open the Trophy Room, tap the puzzle, and switch to the Free fill tab. If that’s empty, the state was likely lost during a reinstall — free-fill data is stored locally on the device only.
Email privacy@otfdp.com with a deletion request. See our Privacy Policy for details on what we collect and your rights.
Sorry about that. Email support@otfdp.com with what you were doing when it crashed and your device/version info. If you can reproduce the crash, a description of the steps that trigger it is extremely helpful.
The prompt is from Apple’s App Tracking Transparency framework. We use the response to decide whether the ads you see are personalized to your interests, or generic. Either choice is fine — the game works identically; only the ads themselves differ.
Email support@otfdp.com with:
The more detail, the faster we can help.
Last updated 2026-05-19. Contact us if anything on this page is out of date.