Important Notice: Before downloading, installing, copying, accessing, or otherwise using AuraCalc (hereinafter “this Application” or “the Licensor”), please read and fully understand all terms of this Agreement. By installing or using this Application, you acknowledge that you have read and agree to be bound by all terms of this Agreement. If you do not agree with any term of this Agreement, do not download, install, or use this Application.
Article 1 Grant and Scope of License
1.1 Subject to your compliance with all terms of this Agreement, the Licensor grants you a non-exclusive, non-transferable, non-sublicensable, limited software use license to install and run this Application on Apple devices personally owned by you.
1.2 This license applies only to legitimate copies of the Application downloaded through the Apple App Store or the Licensor’s official channels. Copies obtained through unauthorized channels are not governed by this license and may pose security risks.
1.3 This license does not grant you access to, modification rights over, or distribution rights for the source code of this Application.
Article 2 Intellectual Property Statement
2.1 The Licensor owns all intellectual property rights in this Application and all its copies, including but not limited to copyrights, patent rights, trademark rights, trade secrets, and source code.
2.2 As a work, this Application is protected by the Copyright Law of the People’s Republic of China and international copyright treaties (including the Berne Convention). This Agreement grants a right of use, not ownership.
2.3 Under no circumstances may users remove, obscure, or modify the rights notices, copyright markings, “AuraCalc” trademark, or any other ownership markings in this Application.
2.4 The “AuraCalc” name and logo are trademarks or registered trademarks of the Licensor; users may not use them in any manner without the Licensor’s prior written consent.
Article 3 User Conduct Standards and Restrictions
3.1 Reverse Engineering Prohibited: Users shall not reverse engineer, reverse compile, or disassemble this Application, or otherwise attempt to extract the source code, algorithms, or internal implementation logic of this Application, except as expressly permitted by applicable law.
3.2 Modification and Distribution Prohibited: Users shall not, or allow others to, modify, tamper with, or translate this Application, or develop derivative works based on this Application. Without the Licensor’s written permission, renting, leasing, lending, distributing, sublicensing, or otherwise making this Application available to third parties is strictly prohibited.
3.3 Compliant Use: Users shall comply with applicable laws and regulations of their jurisdiction and shall not use this Application for any illegal purpose or in any manner that infringes upon the rights of third parties.
3.4 Account Security: Users shall properly safeguard their Apple ID information. The Licensor shall not be liable for losses arising from account leakage or unauthorized use by others due to the user’s own negligence.
Article 4 Application Updates and Maintenance
4.1 To improve user experience and security, the Licensor reserves the right to periodically release application updates. Updates are distributed through the Apple App Store.
4.2 Users may choose not to install updates; however, older versions may contain known defects or security vulnerabilities, and the Licensor does not provide ongoing technical support for older versions. Some features may only be available after updating.
4.3 If a subsequent version of this Application makes material changes to this Agreement, the revised Agreement will be published through in-application notifications or on this page at the time of or after the update.
Article 5 Data Privacy and Security
5.1 Data Ownership: All User Content generated and stored by users during the use of this Application (calculation expressions, results, history records, custom constants and formulas, etc.) is owned by the user.
5.2 Local Processing Principle: This Application stores User Content on the device locally by default and does not upload it to any server operated or controlled by the Licensor. This Application does not collect personal identity information, device identifiers, or location information.
5.3 Security Measures: This Application runs within the Apple App Sandbox environment; on iOS, Data Protection file encryption is enabled; on macOS, security relies on sandbox isolation and FileVault protection. This Application does not request unnecessary system permissions.
5.4 For detailed rules on the processing of Personal Information, please refer to this Application’s Privacy Policy.
Article 6 Disclaimer and Limited Warranty
6.1 As-Is Provision: To the maximum extent permitted by law, this Application is provided “as is” and “with all faults”; the Licensor makes no express or implied warranties regarding the merchantability, fitness for a particular purpose, non-infringement, or error-free nature of this Application.
6.2 Calculation Results: Calculation results provided by this Application are based on Foundation Decimal and a self-implemented Shunting-yard parser, and are subject to the inherent limitations of floating-point arithmetic precision and algorithm implementation. Calculation results are for reference only and do not constitute professional advice (including but not limited to financial, engineering, legal, or medical advice). The Licensor shall not be liable for any losses arising from decisions or actions made in reliance on this Application’s calculation results.
6.3 Assumption of Risk: Users bear the risk of application operational issues and potential data loss caused by uncontrollable factors such as device environment, operating system version, third-party system components, or network. Users should establish comprehensive data backup mechanisms.
6.4 Service Interruption: The Licensor shall not be liable for service interruptions or feature degradation caused by failures, maintenance, or policy changes of Apple platform services (including but not limited to App Store, system frameworks), or by force majeure factors such as network or power outages.
Article 7 Indemnification and Limitation of Liability
7.1 Liability Cap: Except as required by mandatory legal provisions, the total amount of compensation the Licensor is liable for under this Agreement shall in no event exceed the total fees actually paid by the user to the Licensor for the affected Application or service during the effective period of this Agreement.
7.2 Exclusion of Indirect Damages: The Licensor shall not be liable for any indirect, incidental, consequential, special, or punitive losses (including but not limited to loss of profits, business interruption, data loss, damage to goodwill, or disclosure of confidential information), even if the Licensor has been advised of the possibility of such damages.
Article 8 Termination of Agreement
8.1 If the user breaches any term of this Agreement, the Licensor may immediately terminate this license and require the user to bear all losses caused to the Licensor as a result.
8.2 Users may terminate this Agreement at any time by uninstalling this Application.
8.3 Upon termination of the Agreement, the user must immediately cease using this Application and destroy all copies of the Application and related documentation under their control.
8.4 Termination of the Agreement does not affect rights and obligations that arose prior to termination; Articles 5 through 7 shall remain in effect after termination.
Article 9 Agreement Changes
9.1 The Licensor reserves the right to modify this Agreement. The modified Agreement will be published on this page with an updated version number and effective date.
9.2 If the modified Agreement has a materially adverse effect on user rights, the Licensor will notify users through in-application notifications or announcements on this page before the modification takes effect.
9.3 Continued use of this Application after the Agreement is modified constitutes acceptance of the modified Agreement. If the user does not agree with the modifications, they should stop using this Application and terminate this Agreement in accordance with Article 8.
Article 10 Governing Law and Dispute Resolution
10.1 The formation, validity, interpretation, performance, and dispute resolution of this Agreement shall be governed by the laws of the People’s Republic of China.
10.2 Any disputes arising from or in connection with this Agreement shall first be resolved through amicable negotiation between the parties. If negotiation fails, either party may bring a lawsuit before a people’s court with jurisdiction at the Licensor’s domicile.
10.3 If any provision of this Agreement is held to be invalid or unenforceable by a court or arbitral tribunal with jurisdiction, the validity of the remaining provisions shall not be affected, and the remaining provisions shall continue in effect.