DreamFlow is a relaxation app focused on sleep assistance and meditation, designed to help you fall asleep faster at night.
Effective Date: March 15, 2026
This Privacy Policy is provided in English for users in the EU/EEA (GDPR) and California residents (CCPA/CPRA). A Chinese version is available for Chinese users (PIPL) and can be requested via imwangzikang@qq.com.
APPIFUN (hereinafter “we” or “us”) operates the DreamFlow mobile application (hereinafter “the App” or “this App”). This Privacy Policy explains how we collect, use, disclose, and protect your personal information when you use this App. We are committed to protecting your privacy and complying with applicable data protection laws, including but not limited to the Personal Information Protection Law of the People’s Republic of China (PIPL), the EU General Data Protection Regulation (GDPR), the California Consumer Privacy Act (CCPA), and its amendment, the California Privacy Rights Act (CPRA).
By downloading, installing, or using this App, you agree to the terms of this Privacy Policy. If you do not agree, please do not use the App. We may update this Privacy Policy from time to time and will notify you of significant changes via in-app announcements or other prominent means. Your continued use of the App after such changes constitutes acceptance of the revised policy.
This Privacy Policy applies only to this App and does not cover information collected through other channels (e.g., our website or third-party services linked from the App).
**Important Disclosure for Google AdMob Advertising**
We integrate Google AdMob to serve advertisements. This requires collecting and sharing:
with Google LLC and its advertising partners for personalized (targeted) advertising, cross-app/cross-device tracking, measurement, and analytics.
See Google's Privacy Policy: https://policies.google.com/privacy.
Opt-out of personalized ads: Use device settings – Android: Settings > Google > Ads > Opt out of Ads Personalization; iOS: Settings > Privacy > Advertising > Limit Ad Tracking. You may still see non-personalized ads.
We do not engage in invalid traffic, click fraud, or deceptive ad implementations.
We collect mobile device information to provide, maintain, and improve the App’s functionality, including optimization and advertising. Device information refers to data that can identify or be used to identify a device, as defined by PIPL, GDPR, and CCPA/CPRA.
Summary: We collect only the minimum information necessary (e.g., device ID and usage data) to support the App’s functionality, enhance user experience, and deliver advertisements. We do not collect sensitive information (e.g., health data or precise location), and user-provided data (e.g., work hours) is stored locally on your device.
We collect only the minimum personal information necessary to achieve the App’s purposes, adhering to PIPL’s data minimization principle. Information collection is based on your consent, obtained through in-app prompts.
For PIPL (Chinese users), we ensure collection is lawful, necessary, and transparent. For GDPR (EU/EEA users), processing is based on consent or legitimate interests (e.g., ad delivery). For CCPA/CPRA (California residents), we declare that device IDs may be considered personal information and will not be “sold” without your opt-out consent.
We use the collected personal information for the following purposes:
Purpose of the permission: This app requires the App Usage Statistics permission to provide sleep analysis and personalized recommendation features.
Data collected:
How the data is used:
Data storage: All app usage statistics data is stored only locally on your device and is not uploaded to our servers or any third-party servers.
Permission control: You can revoke this permission at any time in your system settings. Once revoked, the sleep analysis feature will no longer be available, but this will not affect other functions of the app.
Purpose of the permission: This app requires notification permission to provide the following features:
Notification types:
Permission control: You can disable notification permission at any time in your system settings. After disabling, you can still use other features of the app, but you will no longer receive reminder notifications, and you will not be able to control audio playback from the lock screen.
Applicable versions: This permission is only required on Android 9 (API 28) and earlier versions.
Purpose of the permission: Used to save downloaded audio files to device storage for offline playback.
Data storage: Audio files are stored in the app's private directory and will not access your other files or photos.
Permission control: On Android 10 and above, the app uses scoped storage (sandboxed storage), so this permission is not required.
To ensure continuous audio playback in the background, this app uses a foreground service. The foreground service displays a persistent playback notification in the notification shade. This is a requirement of the Android system to inform the user that the app is running in the background and to provide playback controls.
Network Security: This app uses HTTPS to encrypt the transmission of sensitive data. Some non-sensitive resources (such as publicly available audio files) may use the HTTP protocol, but no personally identifiable information will be transmitted over HTTP.
Under PIPL, we process personal information only for specified purposes and obtain separate consent for non-essential uses (e.g., advertising). Under GDPR, the legal basis includes consent (for ads) and legitimate interests (for analytics). Under CCPA/CPRA, these are “business purposes,” and we will not use personal information for incompatible purposes without further notice.
| Purpose | Information Used | Legal Basis (GDPR/PIPL/CCPA) |
|---|---|---|
| App Functionality | User-Provided Data, Device Information | Contractual Necessity / Necessity / Business Purpose |
| Analytics | Usage Data, Device ID | Legitimate Interests / Consent / Business Purpose |
| Advertising | Device ID, IP Address | Consent / Explicit Consent / Opt-Out Available |
| Security | All Data | Legitimate Interests / Legal Obligation / Business Purpose |
We integrate the following third-party SDKs to provide specific app functionalities. The data collected and processed by these SDKs depends on your usage and configuration, and we adhere to applicable privacy laws and best practices.
| SDK Name | Usage / Purpose | Function / Description |
|---|---|---|
| Coil | Image loading and caching | Asynchronous loading, memory/disk caching, supports multiple image formats |
| Lottie | Animation rendering | Plays JSON animations exported from After Effects in Android |
| Kotlin Coroutines | Asynchronous programming | Coroutine support, simplifies asynchronous and concurrent programming |
| Gson | JSON serialization / deserialization | Converts objects to JSON and JSON to objects |
| Google Play Services Ads | Google Mobile Ads SDK | Used to display advertisements in the app |
| AppsFlyer | Mobile Attribution and Marketing Analytics Platform | Used to track user acquisition sources, advertising performance, and user behavior |
| play-services-ads-identifier | Get Google Advertising ID (GAID) | Provides an API to retrieve the device's Google Advertising ID (GAID) for ad tracking and attribution analysis. Supports checking whether the user has limited ad tracking. |
We may share your personal information with the following entities:
We do not sell your personal information to unrelated third parties. However, under CCPA/CPRA, sharing device IDs with advertising networks for personalized ads may be considered “selling” or “sharing.” You may opt out through device settings or by contacting us.
For international data transfers:
This privacy policy complies with Google Publisher Policies, AdMob Program Policies, and Google Play Developer Program Policies. We fully disclose AdMob-related data practices as required. For users in EEA/UK/Switzerland, we support consent mechanisms (e.g., via Google User Messaging Platform where integrated) for personalized ads and analytics. You can manage or withdraw consent in-app (if available) or via device settings. We prohibit invalid activity and ensure non-deceptive ad experiences.
We implement appropriate technical and organizational measures to protect your personal information, including encryption of device ID transmission and storage, access controls, and regular security audits. However, no system is completely secure, and we cannot guarantee absolute security. In the event of a data breach, we will notify affected users and relevant authorities via email or in-app announcements, in accordance with PIPL (within a reasonable time, typically within 3 business days), GDPR (within 72 hours), and CCPA/CPRA (if there is a risk of harm).
Audio Files: All sleep sound audio files are stored locally on your device. We do not upload audio files or audio usage data to our servers, except for aggregated analytics (e.g., which sounds are most popular) that cannot identify individual users.
We retain personal information only for as long as necessary to fulfill the purposes outlined or as required by law. For example:
We comply with PIPL, GDPR, and CCPA/CPRA retention rules, deleting or anonymizing personal information upon request or when no longer needed.
Depending on your location, you have the following rights regarding your personal information:
Please exercise your rights by contacting us via email at imwangzikang@qq.com or phone at +8618986000384. To verify your identity, we may require your device ID, email, or other verifiable information. If a request is denied, you may appeal through the same contact methods. To opt out of advertising, use device settings (e.g., iOS “Limit Ad Tracking” or Android “Opt Out of Ads Personalization”).
The information, data analysis, and reminders provided by this App are for reference purposes only and do not constitute any medical advice, diagnosis, or treatment. This App is not a medical device. If you suffer from chronic insomnia, sleep apnea, or any other medical condition, please be sure to consult a qualified medical institution or healthcare professional. Any decisions made based on the information provided by this App are taken at your own risk.
For Reference Only: The sleep advice and analysis reports provided by this App are generated by artificial intelligence (AI) models. You understand and acknowledge that AI-generated content is for reference purposes only, does not represent the opinion of medical professionals, and does not guarantee absolute accuracy, completeness, or usefulness.
Independent Decision-Making: Any actions taken based on AI recommendations (such as adjusting sleep schedules or purchasing sleep-related products) are considered your own independent decisions. You should evaluate such recommendations in light of your personal health condition and consult qualified medical professionals when necessary.
This App is not directed to children under 16 years of age (per GDPR consent age requirements; PIPL requires 14, COPPA requires 13, with the specific age determined by applicable local law). We do not knowingly collect personal information from children. If we discover that a child’s personal information has been collected, we will delete it immediately. Parents or guardians may contact us (see Section 15, “Contact Us”) to review or delete such data.
Software Protection: You may not decompile, disassemble, reverse engineer, crack, modify, or otherwise attempt to extract or obtain the source code of this App in any manner.
Restricted Use of Audio Resources: All audio resources provided by this App (including but not limited to audio files downloaded from servers and stored in the app’s private device directory) are obtained through third-party licenses or other legitimate sources.
No Export: Audio resources are intended solely for use within this App as sleep-assistance features. You may not attempt to export, extract, record, or move them to public storage.
No Distribution: You are strictly prohibited from redistributing, selling, sharing, publishing, or using any audio resources from this App for any other commercial or illegal purposes.
Legal Compliance: You may not use this App to engage in any activities that violate applicable local laws and regulations.
Assumption of Liability: Any legal disputes, copyright complaints, or third-party claims arising from your violation of the above provisions shall be solely your responsibility. The Company and the developers shall not be held liable for any resulting consequences or losses.
Some audio files used in this App are sourced from Pixabay (https://pixabay.com/) and Mixkit (https://mixkit.co/), and are used in strict compliance with their respective Content License agreements. These licenses allow downloaded content (including sound effects, music, and other audio materials) to be used free of charge in both commercial and personal projects, without attribution and without royalty payments. All usage within this App complies with the above rules. If you have any questions, please refer to the latest versions of the licenses available on the respective official websites.
This App uses SDKs and trackers (similar to cookies) for advertising and analytics, collecting device information to provide personalized ads. You can manage preferences through device settings. Under GDPR and PIPL, we obtain consent for non-essential trackers. Under CCPA/CPRA, you can opt out of targeted advertising via the contact methods above.
We may update this policy due to operational or legal requirements. We will notify you via in-app announcements, email, or other prominent means. The updated policy takes effect upon publication.
For questions, complaints, or to exercise your rights, please contact:
Company: APPIFUN LIMITED
Address: FLAT A 15/F, GOLDFIELD INDUSTRIAL BUILDING, 144-150 TAI LIN PAI ROAD, KWAI CHUNG NT, HONG KONG
Email: imwangzikang@qq.com
Phone: +86 18986000384
Under PIPL, our personal information protection officer can be reached via the above email or phone. Under GDPR, our data protection officer can be contacted through the same methods. Under CCPA/CPRA, you may also contact the California Attorney General.
We have submitted a data safety disclosure to Google Play, detailing the App’s data collection and use. You can view this information on the App’s Google Play Store page. For further details, please contact us.
This Privacy Policy applies to APPIFUN, which acts as the data controller or personal information processor for this application. APPIFUN is solely responsible for the collection, use, disclosure, and protection of personal information as described in this policy and bears all related legal liabilities. For any questions or to exercise your rights, please contact APPIFUN directly (see Section 15, "Contact Us").