DEVILS SHANGHAI
Terms of use
Last updated: October 25, 2026
These terms describe the conditions for using Devils Shanghai (悪魔の上海, the "App"), provided by RT Information System ("we").
1. Using the App
The App is a single-player puzzle for personal entertainment on compatible devices. Minors should obtain parental consent where necessary. The Android app is available on Google Play. The iOS version is awaiting review; availability and content may change.
2. Payments and advertising
Android includes ads: a full-screen ad after each completed Mahjong match, and when leaving the results after every four main-stage Shanghai clears. Repeated clears count; study puzzles do not. Optional rewarded ads on the Mahjong home screen grant one starting-hand assistance ticket for free matches when the reward condition is met. Ads are skipped when offline or unavailable. The iOS version does not include ads. There are no in-app purchases.
3. Game data and items
Progress and items are stored on your device. Items have no cash value and cannot be redeemed for money or transferred to others. There is no app-operated cloud sync, and recovery after deletion, reinstallation, or a device change is not guaranteed.
4. Rights and prohibited conduct
Rights in the App’s code, artwork, audio, and other content belong to us or their lawful owners. Third-party assets and libraries are governed by their respective licenses.
Do not use the App unlawfully, infringe others’ rights, obtain rewards through unauthorized modifications, or interfere with its operation. These terms do not restrict conduct permitted by applicable law or open-source licenses.
5. Changes and technical issues
We may modify or suspend features or distribution to improve the App or address technical needs. Where possible, significant changes will be announced in advance.
We cannot guarantee uninterrupted or error-free operation on every device. Nothing in these terms excludes or limits our liability beyond what consumer-protection and other applicable laws allow.
6. Privacy, updates, and contact
Information is handled according to the App’s privacy policy. When these terms change, we will update the revision date and announce significant changes on this site or in the App.
Operator: RT Information System. App: Devils Shanghai (悪魔の上海).