**App name:** Music Tools **Package name:** `com.anycode.musictools` **Edition:** Free Edition (ad-supported) **Developer:** Anycode **Effective date:** November 11, 2026 **Last updated:** November 11, 2026 > This policy applies to the **Free Edition** of Music Tools, which displays advertising. > If you are using **Music Tools PRO** (`com.anycode.musictools.pro`), please read the PRO Edition Privacy Policy instead. --- ## 1. Introduction Welcome to Music Tools ("the App"). The App is a set of tuning and rhythm utilities for traditional Chinese string instruments, currently offering: - Guzheng tuner (21 strings, D/G/C/F/A tunings) - Guqin tuner (7 strings, standard / slow-third / tight-fifth tunings) - Chromatic tuner (full range, adjustable A4 reference) - Metronome (10–208 BPM, time signatures, subdivisions, countdown timer) We respect your privacy. This policy explains what information the App accesses, how it is used, who it may be shared with, and the choices you have. Please read it carefully before using the App. By installing or using the App, you acknowledge the practices described below. **Plain-language summary:** the App does not require an account, does not ask for your name, email, phone number or location, and does not upload your microphone audio or your settings anywhere. The only third party that receives data through the App is our advertising partner, Google AdMob, which is used to display the ads that support the Free Edition. --- ## 2. Summary of Data Practices | Practice | Free Edition | | --- | --- | | Account creation / sign-in | Not required, not offered | | Microphone used for tuning | Yes — processed on your device only, never stored or transmitted | | Audio recordings saved or uploaded | No | | Personal data collected by us (name, email, contacts, photos, precise location) | No | | Settings stored on your device | Yes (A4 reference, sensitivity, tunings, metronome parameters) | | Settings uploaded to our servers | No | | Advertising SDK included | Yes — Google AdMob (banner and interstitial ads) | | Advertising ID (AD_ID) permission | Yes — declared by the advertising SDK | | Analytics or crash-reporting SDK | No | | Third-party trackers other than Google AdMob | No | --- ## 3. Information We Do Not Collect We do not collect, request, or have access to: - Your name, email address, phone number, postal address, or any account credentials - Your contacts, calendar, SMS, call logs, photos, or files - Your precise or approximate location - Your microphone recordings, your instrument audio, or any audio files - Your device's files, external storage, or media library - Biometric, health, or financial information The App has no login, no user profile, no cloud sync, and no server-side user database. --- ## 4. Microphone Access (Tuner Features) The tuner features need to "listen" to your instrument in order to detect pitch. For this reason the App requests the `RECORD_AUDIO` permission. - **Purpose.** The microphone is used solely to capture the sound of a plucked string so the App can estimate its fundamental frequency and show you whether the note is sharp, flat, or in tune. - **Processing location.** Audio is processed entirely on your device by a pitch-detection engine bundled inside the App (FFT/YIN-based analysis at 22050 Hz). No audio is sent to us or to any third party. - **Storage.** Audio is processed as a continuous in-memory stream. The App does not record, save, export, or share audio files. Buffers are discarded immediately after analysis. - **Control.** The microphone is only active while a tuner screen is in the foreground and listening. You can deny the permission, or revoke it at any time in **Android Settings → Apps → Music Tools → Permissions → Microphone**. If you deny it, the tuner cannot function, but the metronome and all remaining features continue to work. The App also declares the microphone as an optional hardware feature, so it remains installable on devices without one. The microphone is **never** used for advertising, profiling, or analytics purposes. --- ## 5. Internet Access and Advertising (Google AdMob) The Free Edition is supported by advertising. To display ads, the App uses **Google AdMob**, a service provided by Google LLC (and its affiliates). Advertisements appear as a banner on the home screen and as occasional full-screen (interstitial) ads at natural transition points, such as when you open a tool. To serve, measure, and secure ads, the AdMob SDK may collect and process: - Advertising ID (Android Advertising ID) and other device or app identifiers - Device information such as model, manufacturer, operating-system version, screen properties, and language - IP address, which may be used to derive approximate (city-level) location - Information about ad requests, impressions, clicks, and interactions with ads - App usage signals needed for ad delivery, frequency capping, and fraud/abuse prevention This information is collected and processed by Google as an independent data controller under its own policies, not by us. We do not receive your advertising ID or any of the above data in identifiable form; we only receive aggregated, non-identifying reports such as total impressions and estimated revenue. **Google's policies:** - Google Privacy Policy: https://policies.google.com/privacy - How Google uses information from partner sites and apps: https://policies.google.com/technologies/partner-sites - AdMob and advertising technologies: https://policies.google.com/technologies/ads **Your choices regarding advertising:** - **Reset or delete your Advertising ID, or opt out of personalized ads:** Android **Settings → Google → Ads** (path varies by device manufacturer and Android version). When personalized ads are disabled, you may still see non-personalized ads. - **Limit ad tracking at OS level:** Android **Settings → Privacy → Ads**. - The `AD_ID` permission is declared only in the Free Edition, because it is required by the advertising SDK. The PRO Edition does not include the advertising SDK or this permission. We do not use your microphone audio, your tunings, or your metronome settings to target advertising. --- ## 6. Information Stored Locally on Your Device The App saves a small amount of configuration data in its private app storage (Android `SharedPreferences`) so that your preferences persist between sessions. This includes: - A4 reference frequency per instrument - Detection sensitivity level - Last selected tuning preset and temperament per instrument - Metronome tempo (BPM), beats per bar, beat note value, click sound, accent setting, and last countdown duration This data stays on your device. It is not transmitted to us, is not readable by other apps, and is deleted when you uninstall the App or clear its data (**Android Settings → Apps → Music Tools → Storage → Clear data**). **Device backups.** The App allows Android's system backup feature (`allowBackup`). If you have Google Drive backup enabled on your device, Android may include the App's private data (the settings listed above) in your own encrypted device backup. This backup is controlled by you and by Google, not by us. You can disable it in **Android Settings → System → Backup**. --- ## 7. Notifications and Background Playback (Metronome) When the metronome is running, the App keeps it alive with an Android foreground service of type `mediaPlayback` and shows a persistent notification, so the beat continues while you practice and so you can return to the metronome quickly. - The notification contains only the text "Metronome running" and a shortcut back to the App. - On Android 13 and later, the App may ask for the `POST_NOTIFICATIONS` permission. Granting it is optional; if you decline, the metronome still works, but the ongoing notification may not be shown. - No personal data is collected through the notification or the foreground service. The App does not run in the background for any other purpose, does not use the microphone in the background, and does not start at device boot. --- ## 8. Privacy Policy Web Page The "Privacy Policy" link on the home screen opens a web page inside the App using an embedded browser (`WebView`). The page is hosted at: `https://www.anycode.xyz/privacy.html` Loading this page requires the `INTERNET` permission. When the page is loaded, our web host may receive standard technical information that any web request carries, such as your IP address, user agent, and the time of the request, in order to deliver the page and protect the server. This is separate from the App's own data practices and is described in the policy published on that page. The embedded browser does not expose any App data to the web page: there is no JavaScript bridge, no file access, and no sharing of your settings, microphone, or advertising data with the page. --- ## 9. How We Use Information Because we do not collect personal information ourselves, our use of information is limited to: 1. **Providing App functionality** — processing microphone input in real time to detect pitch, and storing your preferences locally on your device. 2. **Displaying advertising** — allowing Google AdMob to serve and measure ads that keep the Free Edition free. This processing is performed by Google. 3. **Responding to you** — if you contact us by email, we use your message and address only to answer your request. 4. **Legal compliance and safety** — where required by applicable law, or to protect our rights and the safety of users. We do **not** sell your personal information, and we do not build user profiles, run analytics, or use your data to train models. --- ## 10. Sharing and Disclosure We do not share personal information with third parties, except: - **Google AdMob (advertising).** As described in Section 5, the advertising SDK transmits the data listed there directly to Google for ad delivery and measurement. - **Service providers for our website.** Our web host processes standard request logs when the privacy page or other informational pages are loaded. - **Legal requirements.** We may disclose information if required to do so by law, regulation, subpoena, or other valid legal process, or when we believe in good faith that disclosure is necessary to protect rights, property, or safety. In practice we hold no personal data that could be disclosed. - **Business transfer.** If the App or our business is transferred, acquired, or merged, information may be transferred as part of that transaction; this policy would continue to apply to previously collected data unless you are notified otherwise. We never sell data, and we never share data with data brokers. --- ## 11. Data Retention - **Microphone audio:** not retained — processed in memory and discarded immediately. - **Local settings:** retained on your device until you clear the App's data or uninstall the App. - **Advertising data:** retained by Google according to Google's own retention policies. - **Email correspondence:** retained only for as long as needed to handle your request, then deleted. --- ## 12. Security We design the App to minimise risk by keeping data on your device: - Microphone audio is analysed locally and never transmitted. - There is no user account, so there are no credentials or profiles that could be breached on our side. - The App does not request storage, location, contact, or camera permissions. - The App communicates over the network only through the advertising SDK and when loading the privacy page, both over encrypted HTTPS connections. No method of electronic storage or transmission is completely secure. Because we do not operate a server that stores your personal data, the primary safeguard is that the data never leaves your device. You are responsible for the physical security of your device and for its screen lock. --- ## 13. Your Rights and Choices Depending on where you live, you may have rights under laws such as the EU/UK General Data Protection Regulation (GDPR), the California Consumer Privacy Act as amended by the CPRA, or similar legislation. Because we do not collect personal information through the App, most of these rights are satisfied by design; nevertheless, you can: - **Access / know:** request confirmation of whether we hold personal data about you. In practice we hold none from the App. - **Delete / erase:** clear the App's local data in Android settings or uninstall the App; request deletion of any email correspondence by contacting us. - **Object to or restrict processing:** disable personalized ads in your device's Google Ads settings, which restricts the advertising-related processing performed by Google. - **Opt out of sale or sharing:** we do not sell or share personal information as defined by the CCPA/CPRA. Advertising-related processing is carried out by Google under its own opt-out mechanisms. - **Non-discrimination:** we do not offer different features or prices based on whether you exercise privacy rights. - **Withdraw consent:** revoke the microphone or notification permission at any time in Android settings; the corresponding feature will stop, and the rest of the App keeps working. - **Lodge a complaint:** you may complain to your local data protection authority. To exercise any right, or if you are an authorised agent acting on behalf of a user, contact us using the details in Section 17. We respond within the time limits required by applicable law. --- ## 14. Children's Privacy The App is a general-audience music utility. It is not directed to children under 13 (or the applicable age of digital consent in your country), and we do not knowingly collect personal information from children. - No account, profile, or personal data is requested from any user, including children. - Ads shown through the App are not configured as child-directed content. - If you are a parent or guardian and believe a child has provided us with personal information (for example, by emailing us), contact us and we will delete it. If you are located in a jurisdiction with stricter requirements for minors, we recommend supervising minors' use of any ad-supported app. --- ## 15. International Users and Data Transfers The App can be installed worldwide. Because we do not collect personal data ourselves, there is no transfer of your data by us across borders. Data processed by Google AdMob and by our web host may be transferred to and processed in countries other than your own, including the United States, under the safeguards described in Google's privacy policy. If you are in the European Economic Area, the United Kingdom, Switzerland, or another region with data-transfer restrictions, note that the only international processing relevant to the App is that performed by Google as an independent controller. --- ## 16. Changes to This Policy We may update this policy to reflect changes in the App's features, third-party services, or legal requirements. When we do: - The "Last updated" date at the top of this document will change. - The current version is always available from the "Privacy Policy" link on the App's home screen. - For material changes, we will provide additional notice within the App or in the store listing where appropriate. Your continued use of the App after an update takes effect means you accept the revised policy. If you do not agree, please stop using the App and uninstall it. --- ## 17. Contact Us If you have questions, requests, or concerns about this Privacy Policy or the App's data practices, please contact: **Email:** 245677520@qq.com We aim to respond to all privacy inquiries within 30 days. --- *This Privacy Policy is effective as of November 11, 2026 and applies to Music Tools Free Edition version 1.0.0 and later until replaced.*