App: STEM Calculator - Beautiful Game Skins Developer: Phan Hoàng Sang (operating under the name AppHelpMe) Android package: com.apphelpme.calculator Last updated: August 26, 2026 This Privacy Policy explains how STEM Calculator - Beautiful Game Skins (the “App”) handles and protects information. The App does not require an account and does not send saved calculations to a cloud server operated by AppHelpMe. 1. Data handled by the App The App may process data that you enter or create, including: Mathematical expressions and calculation results. Notes, results, and history that you choose to save. Content and history from the Random Code Generator tool. Language, appearance, skin, and effect preferences. Backup files or JSON files that you choose to export or import. This information is stored locally on your device. AppHelpMe does not automatically upload your calculations, notes, or Random Code Generator history to its servers. 2. How local data is used Local data is used to perform calculations, display results, save and organize history, restore backups, generate random codes, and remember the settings you select. 3. Advertising and data processed by Google The free version uses the Google Mobile Ads SDK (AdMob) to display advertisements and the Google User Messaging Platform (UMP) to manage privacy choices where required by law. According to Google, the Google Mobile Ads SDK may automatically collect or share: IP address, which may be used to estimate a device's general location. App or advertising interactions, such as app launches, taps, and ad views. Diagnostic and performance information relating to the App or SDK. Device identifiers, advertising identifiers, App Set ID, or other related identifiers where applicable. Google may use this data to deliver and measure advertisements, limit ad frequency, prevent fraud, protect advertising systems, and personalize ads when you have consented and applicable law permits it. Google states that data collected by the Google Mobile Ads SDK is encrypted in transit. For more information, see the Google Privacy Policy and How Google uses information for advertising. 4. Consent and advertising choices In regions where consent is required, the App uses UMP to present a privacy message before requesting ads. Where available, you can review or change your choices through “Ad privacy options” in the App's Settings. You can also manage or reset your advertising identifier in your device's privacy settings. When PRO access is active, the App does not request or display advertisements. 5. Data sharing AppHelpMe does not sell your saved calculations, notes, or history. Data may leave your device when: You intentionally export, import, or share a backup file. You open a website in a browser or share content through another app. Google Mobile Ads and UMP process advertising-related data as described in this policy. Third-party services or apps that you choose to use may apply their own privacy policies. 6. Data retention and deletion Local data remains on your device until you delete individual items, clear history, clear the App's data in system settings, or uninstall the App. You must delete exported or shared files from the location where they were saved or from the receiving app. Advertising data processed by Google is retained in accordance with Google's policies and legal obligations. 7. Security Calculator data is stored in the App's private storage area on your device. You should protect your device and any exported backup files. No electronic storage or transmission method can be guaranteed to be completely secure. 8. Children's privacy The App provides general-purpose calculation and educational tools. It does not require users to provide their name, address, telephone number, or create an account. AppHelpMe does not knowingly request or directly collect children's personal information through the calculator features. A parent or guardian may contact AppHelpMe if they believe that a child has provided personal information through a channel controlled by AppHelpMe. 9. Your choices You may choose not to save results, delete saved data, remove exported backup files, clear all App data, manage advertising privacy choices, manage the advertising identifier in your device settings, or uninstall the App. 10. International data transfers Google and advertising service providers may process data in countries other than the country where you live. Such processing is governed by the privacy policies and data protection mechanisms of the relevant providers. 11. Changes to this policy This policy may be updated when the App's features, third-party services, or data practices change. The latest revision date will be displayed at the top of this page. 12. Contact If you have a privacy-related question, request, or complaint, please contact AppHelpMe: Website: https://www.apphelpme.com Contact page: https://www.apphelpme.com/en/contact.html Note: This policy applies to the App with the Android package com.apphelpme.calculator. Other AppHelpMe products may have separate privacy policies.