Support
FAQ and how to reach us
I can't crack a cipher. What should I do?
Each puzzle has staged hints. The first hint is free and recaps the cipher type. If you are still stuck, you can reveal more in stages: the solving direction, then the first few letters, then nearly the answer. Start with the first hint.
How do I get more hints?
The first hint is free. From the second hint onward, one hint ticket is consumed. Tickets are available via in-app purchases such as the "10 Hint Pack" in Settings (we plan to add earning tickets by watching a video ad in the future).
Can I remove ads?
Yes. Purchasing "Remove Ads" or "Premium" hides all banner and interstitial ads. Note that no ads are shown while you are solving a puzzle to begin with.
What is the Modern Cipher Pack?
An in-app purchase that unlocks the public-key (RSA, simplified), hash function, and block cipher stages. XOR and the classic ciphers are free. It is also included in "Premium."
My purchase isn't reflected / it disappeared after changing devices
Non-consumable purchases (Remove Ads, Modern Cipher Pack, Premium) can be restored with "Restore Purchases." Make sure you are signed in with the same Apple ID / Google account and try restoring from Settings. If it persists, contact support@fujibit.com.
My progress disappeared
Progress is stored on your device and may be lost when reinstalling the app or changing devices. Please contact us if you need help.
Which devices are supported?
iPhone / iPad on iOS 17 or later, and Android (phones and tablets).
What languages are supported?
The app menus support Japanese and English (following your OS language). Note that the puzzle prompts and hints are currently Japanese only.
Contact
If this doesn't resolve your issue, feel free to reach out:
Fuji Bit Inc.
Email: support@fujibit.com
Tip: including your device model, OS version, and app version helps us respond faster.