App: Cube Master · Developer: Thoiba Trader · Effective / last updated: 17 October 2026
In short: Cube Master does not collect, store, or transmit any personal information. There are no accounts, no ads, no analytics, and no data sent to us or anyone else. Game progress is saved only on your own device.
This Privacy Policy describes the data practices of the app Cube Master ("the App"), published by Thoiba Trader, a sole proprietorship run by Sanathoiba Singha, based in Lanka City, Hojai, Assam, India. The App is designed to be suitable for children as well as general audiences, and this policy is written to comply with that responsibility. This policy applies only to the App itself, and is separate from the general privacy policy for apps.thoibatrader.com.
We do not collect any personal information from users of the App. Specifically, the App:
The App saves gameplay progress — such as lessons completed, stars earned, levels unlocked, sound and vibration settings, and whether the full game has been purchased — using your device's local storage. This information stays on your device only. It is never transmitted to Thoiba Trader, to Amazon, or to any other party. If the App is uninstalled, this locally stored information is removed along with it.
The App works fully offline. Its fonts, 3D graphics, and voice-lesson audio are bundled inside the App, so it does not need to connect to any server to run.
Cube Master offers one optional one-time purchase ("Unlock everything") to unlock all lessons and all challenge levels beyond the free ones. This purchase is handled entirely through the Amazon Appstore's in-app purchasing system. We never see, receive, or store your payment details, card number, or billing information — that is processed directly by Amazon under Amazon's own privacy policy. We only receive a simple confirmation of whether the unlock was purchased, which is then saved locally on your device as described in Section 2.
The App contains no advertisements of any kind, and therefore no advertising identifiers, ad SDKs, or ad-related data collection are used.
Cube Master is intended to be suitable for children. Because the App collects no personal information, includes no advertising, and includes no way to communicate with other people, no personal information is ever collected from children who play it — in line with the intent of children's privacy laws such as COPPA. If you are a parent or guardian and have any concern about the App and your child's use of it, please contact us using the details below.
Because no personal information is collected, none is shared with or sold to third parties. There is nothing to share.
Since gameplay data is stored only on your own device and never leaves it, the App does not transmit this data over the internet, reducing the risk of it being intercepted or exposed elsewhere.
If a future update to the App changes what data is collected or how it is used, this policy will be updated accordingly and the "last updated" date above will change. We encourage checking back if you have concerns before updating the App.
If you have questions about this policy, or about Cube Master generally, contact: