User Service Agreement

Preamble

This User Service Agreement (the "Agreement") is entered into between Dufengxun Studio ("we," "us," or the "Studio") and you ("user" or "you"). It governs your use of the mobile applications we develop and the related services (collectively, the "Services") that we publish globally. The Agreement applies to all users of our Services worldwide and adapts simultaneously to the terms of the Apple App Store, Google Play, and other distribution platforms, the relevant rules of every monetization platform, and the laws and regulations of every country and region (such as China's Cybersecurity Law and the EU's E-Commerce Directive), ensuring full compliance of the Services.

By downloading, installing, or using our Apps, you confirm that you have read, fully understood, and voluntarily agreed to this Agreement, the Privacy Policy, and any other related in-App rules (such as ad rules and in-app-purchase rules). If you do not agree to any term, please do not download, install, or use our Apps.

1. General Provisions

1.1

We may update this Agreement in response to changes in global laws, distribution-platform policies, monetization-platform requirements, service-optimization needs, or regulatory changes. After an update, we will inform you through in-App pop-ups, push notifications, and in-App announcements. Your continued use of our Services indicates your agreement with the updated Agreement.

1.2

This Agreement is an integrated part of, and inseparable from, the Privacy Policy. Together, they govern your complete relationship with us regarding the Apps and Services.

2. Service Content & Scope

2.1 Core Services

We provide you with the complete functional services of our Apps — covering personal-parameter tracking, decision support, time visualization, life-specification management, mood journaling, inventory management, and similar use cases — to meet your diverse needs, ensure stable and smooth operation, and continuously optimize service quality.

2.2 Monetization-Related Services

IAA Advertising Services: Compliant ads are displayed within our Apps in formats including splash ads, interstitial ads, banner ads, rewarded video ads, native ads, app-open ads, and MREC units. Ad content is provided by third-party monetization platforms. We strictly review ad content to ensure it is compliant, non-offensive, and not vulgar, conforming to every country's advertising-regulation policies and distribution-platform requirements. You can disable ad delivery in the App's settings; doing so may affect access to some free features.

IAP In-App Purchase Services: We offer in-app paid features and value-added services (such as unlocking advanced features, removing ads, or expanding storage). The purchase process is completed through the Apple App Store, Google Play, and other distribution platforms. Payment rules and refund policies follow the relevant distribution platform's rules; we do not directly receive your payment and only provide the corresponding paid Service.

2.3 Supplementary Services

These include but are not limited to customer-service consultation, troubleshooting, version updates, feature optimization, and App usage guidance.

2.4 Service Limitations

We may, in accordance with server load, user behavior, compliance requirements, and regulatory changes, temporarily limit or suspend part of the Services. We will try to notify you before any limitation or suspension, to safeguard your legitimate rights and interests.

3. User Rights & Obligations

3.1 User Rights

• To use all compliant Services we provide (subject to this Agreement and applicable rules), enjoying a stable, high-quality service experience.
• To submit suggestions and feedback on App features and service quality. We will carefully consider every submission and optimize products and services in a timely manner.
• To enjoy the privacy protection and security safeguards stipulated in this Agreement.
• To apply for a refund of in-app purchases in accordance with this Agreement and the rules of the distribution platform (subject to eligibility).
• To cancel your account, uninstall Apps, and terminate use of our Services at any time, free of any forced binding.

3.2 User Obligations

• Strictly observe this Agreement, the Privacy Policy, and all other in-App rules; observe the laws and regulations of every country and region, as well as the rules of distribution platforms and monetization platforms.
• Do not maliciously use the Apps. Do not engage in click-fraud, fake-volume activity, dissemination of illegal or non-compliant content (such as violence, pornography, vulgarity, false information), or infringement of others' legitimate rights.
• Do not alter App code, crack App permissions, bypass security protection or payment restrictions, or use third-party plug-ins or scripts.
• Safeguard your account and device information. In case of theft or loss, notify us promptly.
• Provide true and complete personal information (where you choose to provide it).
• Use of our Apps by minors must be conducted with the consent of their legal guardian.
• Do not transfer, rent, or lend the Apps or related Services, and do not use them for commercial profit without our written authorization.

4. Our Rights & Obligations

4.1 Our Rights

• To provide, optimize, and update the Apps and related Services, and to add, remove, or adjust App features in accordance with compliance requirements, user needs, and regulatory changes.
• To monitor and review user behavior. If we discover a violation of this Agreement, applicable laws, or distribution-platform / monetization-platform rules, we reserve the right to take measures including warning, limiting service, terminating service, and deleting the account and related information.
• To collect, use, store, transmit, and disclose your personal information in accordance with this Agreement and the Privacy Policy, for the purposes of providing Services, monetization, and compliance audits.
• To display advertising (IAA mode) and to set the prices and content of in-app purchases (IAP mode); price and content adjustments will be notified in advance.
• To temporarily suspend or terminate part or all of the Services due to force majeure, server failures, regulatory requirements, etc.
• To pursue your liability for any violation of this Agreement or applicable laws, and to cooperate with regulatory authorities in investigations.

4.2 Our Obligations

• To provide stable, compliant, high-quality Services in accordance with this Agreement.
• To strictly observe the Privacy Policy and all global privacy and data-security laws, protecting your personal information from leakage, alteration, or loss.
• To strictly review advertising content from third-party monetization platforms.
• To assist you with in-app-purchase refund applications in accordance with distribution-platform policies.
• To provide convenient customer-service consultation channels and respond to your inquiries, feedback, and complaints within agreed timeframes.
• To regularly update App versions, fix vulnerabilities, and optimize features.
• To clearly inform you of the Apps' features, service scope, monetization model, and terms of the Agreement.
• To comply with the laws and regulations of every country and region, the relevant rules of distribution and monetization platforms, and to proactively accept regulatory supervision and audit.

5. IAA + IAP Supplementary Terms

5.1 IAA Advertising Terms

Ad Sources: We integrate globally compliant third-party ad networks, including Google AdMob, Google Ad Manager, Meta Audience Network, Unity Ads (Unity LevelPlay / ironSource), AppLovin MAX, Pangle (by ByteDance), Mintegral, Chartboost, Vungle (by Liftoff), AdColony (by Digital Turbine), Tapjoy, InMobi, Smaato, Verizon Media, Start.io, Digital Turbine (Fyber), Moloco, Liftoff, and platform-native Apple Search Ads / iAd.

Ad Formats: Banners, interstitials, rewarded videos, native ads, app-open ads, MREC units, and splash ads. You can disable ad delivery in the App's settings; doing so may affect access to some free features.

Ad Data: Ad-view and click data is collected and aggregated by third-party platforms for ad-performance optimization. Their data-handling behavior follows each platform's own privacy policy and applicable laws. We strictly constrain the data-collection scope of every third party.

Ad Liability: Where ad content is non-compliant, false, or fraudulent, the third-party ad platform and the advertiser bear full responsibility. All ad delivery is adapted to Apple's App Tracking Transparency (ATT) Framework and Android's Privacy Sandbox requirements.

5.2 IAP In-App Purchase Terms

Purchase Process: In-app purchases are completed through the Apple App Store, Google Play, and other distribution platforms. You must complete payment in accordance with platform requirements.

Price & Validity: Prices will be clearly displayed in the App. Prices may be adjusted for region, currency, and promotional activities; advance notice will be provided. The validity period of paid features will be clearly marked. Upon expiry, the App reverts to the free version (where applicable).

Refunds: Refunds are processed in accordance with the official refund policies of the App Store and Google Play. We will actively assist you in submitting refund requests; the outcome is subject to the platform's review.

Paid Entitlement Protection: Upon successful purchase, we will ensure you can use the corresponding Service in full during the validity period. If a fault prevents use, we will repair it promptly and, based on the duration of the fault, extend your Service validity accordingly or assist you with a refund.

6. Service Suspension & Termination

6.1 Suspension

Due to server maintenance, system upgrades, compliance checks, force majeure, or regulatory requirements, we may temporarily suspend part or all of the Services. We will notify you through in-App pop-ups, push notifications, and in-App announcements in advance, and we will work to minimize the duration of any suspension.

6.2 Termination

• User-Initiated Termination: You may at any time uninstall the App, cancel your account, and terminate use of our Services.
• Termination for Cause: If you violate this Agreement, the Privacy Policy, or applicable laws, we reserve the right to terminate service, delete your account and related information, and not refund any fees you have paid.
• Termination for Operational Reasons: If we cease operation of an App or terminate Services due to legal or regulatory changes, we will notify you at least 30 days in advance through in-App announcements and push notifications, and properly handle your personal information and unused paid entitlements.

7. Intellectual Property

7.1

All intellectual property in the Apps and related Services we develop (including but not limited to App code, interface design, logos, written content, and feature algorithms) belongs to us and is protected by the intellectual-property laws of every country and region. Without our written authorization, you may not copy, modify, distribute, transfer, rent, or sell any related intellectual property content.

7.2

Content you generate while using our Apps (such as uploaded images, text, records) belongs to you. You grant us a license to use such content reasonably in providing and optimizing the Apps (not for commercial profit, and not in a way that discloses your personal privacy).

7.3

You may not use our Apps to infringe the intellectual property rights of others. If you infringe others' intellectual property through use of our Apps, you bear full responsibility. We reserve the right to terminate service and pursue your liability.

8. Dispute Resolution

8.1

The signing, performance, interpretation, and dispute resolution of this Agreement are governed by the laws of the People's Republic of China (excluding conflict-of-laws rules). Where your country or region has stricter legal requirements, those local laws shall prevail.

8.2

Disputes between you and us should first be resolved through friendly negotiation. If negotiation fails, either party may bring suit before the people's court with jurisdiction at our location.

8.3

During dispute resolution, except for the matters in dispute, the other provisions of this Agreement remain in effect, and both parties should continue to fulfill their respective obligations.

9. Miscellaneous

9.1

If any provision of this Agreement is found to be invalid, revocable, or unenforceable, the validity of the remaining provisions shall not be affected.

9.2

Our failure to exercise or delay in exercising any right under this Agreement shall not constitute a waiver of that right, nor shall it affect our subsequent exercise of that right.

9.3

Any notice or communication between you and us may be made through in-App announcements, push notifications, or customer-service channels. Notices shall be deemed delivered as of the date of sending.

9.4

This Agreement takes effect on the date you download, install, or use our Apps. It terminates automatically upon termination of use and account cancellation (but the Privacy Policy's provisions on information retention and disclaimers shall continue in effect).

9.5 Contact

If you have any questions, feedback, or complaints, please contact us through the following channels:

• Customer Service Email: contact@dufengxun.com
• Privacy & Compliance: privacy@dufengxun.com
• Address: Hoa Lac Hi-Tech Park, Hanoi, Vietnam