Zcritical Terms of Service

PLEASE READ THESE TERMS OF SERVICE CAREFULLY BEFORE USING THE APPLICATION. This agreement (the "Agreement") is entered into between you ("User") and KeepSwinging Technology (Shenzhen) Co., Ltd. ("Company", "we", "us", or "our") regarding your use of the Zcritical mobile application (the "App") and related hardware and software services. By checking the consent box, tapping "Get Started," or using the App, you agree to be bound by this Agreement. If you do not agree, do not use the App. 1. SCOPE AND ACCEPTANCE 1.1 This Agreement includes these terms, all rules and policies published or to be published by us (including the Privacy Policy). All such documents are integral parts of this Agreement. 1.2 We may revise this Agreement from time to time. Revisions will be notified via in-app notice or popup. Continued use after revision constitutes acceptance of the revised terms. 2. ACCOUNTS 2.1 The App connects to devices directly via Bluetooth Low Energy (BLE). It does NOT require account registration, login, or any credentials such as phone number or password. 2.2 Device pairing information, preferences, and custom settings are stored locally on your device. Changing phones or reinstalling the App may result in loss of local data. This is independent of data stored on the hardware device itself. 3. SERVICES 3.1 The App provides BLE connection and control for Critical T1 smart hardware, including fan speed, lighting, color customization, treadmill control, atomization/humidification, device naming, firmware OTA updates, logo upload, and user feedback submission. 3.2 Available features depend on the specific product tier purchased (Essential / Plus / Flagship). Different tiers support different capabilities; actual feature availability is determined by the device. 3.3 We may add, adjust, or optimize services over time. Such changes constitute part of the services. 4. USER CONDUCT You agree not to: 4.1 Use the App for any illegal purpose or in violation of any applicable law; 4.2 Reverse engineer, decompile, crack, or otherwise attempt to derive source code of the App or firmware; 4.3 Disrupt or interfere with the App's operation or servers, or transmit malware; 4.4 Flash unauthorized firmware or tamper with device identifiers. Any damage or security risks caused by such actions are solely your responsibility. 5. HARDWARE SAFETY (IMPORTANT — PLEASE READ) 5.1 This product contains fans, treadmills (drive belts), atomizers, and other components with moving parts or heat-generating elements. Always follow the product manual for safe operation. Keep away from children and pets. Avoid entanglement of clothing, hair, or fingers. 5.2 Do not operate atomization or other functions in flammable, explosive, humid, or unventilated environments. Use only specified power supplies and accessories. 5.3 Adjusting speed, lighting, or other parameters via the App immediately drives the connected hardware. Ensure your surroundings and personal safety before making adjustments. Factory default parameters are set to a conservative safe zone; increasing to more aggressive settings is your active choice — exercise caution. 5.4 We are not liable for injury or property damage resulting from failure to follow the product manual, unauthorized modifications, use of unofficial accessories, or improper operation. 6. INTELLECTUAL PROPERTY 6.1 All intellectual property rights in the App, related software, firmware, interface design, text, graphics, trademarks, logos, and other content are owned by us or our licensors and are protected by applicable laws. 6.2 You may not copy, distribute, sell, rent, modify, or commercially exploit any part of the App without our prior written permission. 7. DISCLAIMER AND LIMITATION OF LIABILITY 7.1 The App is provided on an "AS IS" and "AS AVAILABLE" basis. To the maximum extent permitted by law, we disclaim all warranties regarding timeliness, security, and uninterrupted service beyond statutory minimums. 7.2 We are not liable for service interruption or data loss caused by force majeure, device failure, network outage, or third-party services (e.g., crash reporting services) to the extent permitted by law. 7.3 To the maximum extent permitted by law, we are not liable for indirect, incidental, or consequential damages arising from your use or inability to use the services. This clause does not affect liability that cannot be excluded by law. 8. SERVICE CHANGES, INTERRUPTION, OR TERMINATION 8.1 We may change, suspend, or terminate all or part of the services due to business restructuring, technical upgrades, or compliance requirements, with reasonable prior notice. 8.2 Essential-tier products without Bluetooth or OTA capability cannot receive remote firmware updates; their functionality is as-shipped. 9. GOVERNING LAW AND DISPUTE RESOLUTION 9.1 This Agreement is governed by the laws of the People's Republic of China (excluding Hong Kong, Macau, and Taiwan). 9.2 Any dispute arising from this Agreement shall be resolved through friendly negotiation. If negotiation fails, either party may submit the dispute to a competent court in the district where our company is registered (Nanshan District, Shenzhen, China). 10. MISCELLANEOUS 10.1 If any provision of this Agreement is found invalid or unenforceable, the remaining provisions remain in full effect. 10.2 Section headings are for convenience only and do not affect interpretation. 10.3 For any questions regarding this Agreement, contact us at support@keepswinging.cn. KeepSwinging Technology (Shenzhen) Co., Ltd.