ast Updated: August 28, 2025
Welcome to Duomi Compound Interest Calculator (hereinafter referred to as “the App”). Please read these Terms of Use (“the Terms”) carefully before using this App.
By downloading, accessing, or using the App, you acknowledge that you have read, understood, and agreed to be bound by these Terms.
1. Service Description
- This App is developed and provided by Dongjun Jin. It is a financial tool for compound interest calculations, profit/loss analysis, and position management.
- This App is for personal calculation and reference purposes only and does not constitute any investment, trading, or financial advice.
- The features and content of the App may be updated or modified from time to time to improve the user experience.
2. Paid Services
a. One-Time Purchase
- Users may unlock premium features permanently by making a one-time payment.
- One-time purchases do not auto-renew and do not require cancellation.
b. Annual Subscription
- The App also offers an annual subscription plan. Fees will be charged in advance for each 12-month subscription period.
- Unless auto-renew is canceled before the end of the current period, the subscription will automatically renew for another year.
- Each Apple ID can only have one active subscription for the App at any given time.
3. Refund Policy
- All fees, whether for a one-time purchase or an annual subscription, are non-refundable once paid.
- Please confirm your decision before making a purchase or allowing your subscription to renew.
4. Canceling Subscription
To stop auto-renewal, please cancel at least 24 hours before the end of the current subscription period:
- Open Settings on your device
- Tap Apple ID
- Select Subscriptions
- Find Duomi Compound Interest Calculator and tap Cancel Subscription
After canceling, you will still have access to the premium features until the current subscription period ends.
5. Restore Purchases
- For one-time purchases: If you change devices or reinstall the App, you can use the “Restore Purchase” feature to regain access.
- For subscriptions: If you have already subscribed but the subscription is not activated or shows as “already subscribed,” use the “Restore Purchase” button to reactivate your subscription.
6. Usage Rules
- All purchases (including one-time purchases and subscriptions) are for personal use only. Except for Apple Family Sharing, account sharing or reselling is strictly prohibited.
- Users may not use the App for any unlawful or unauthorized purposes, including but not limited to fraud, infringement, or disrupting service stability.
- Violations may result in immediate suspension or termination of access without notice, and legal action may be pursued if necessary.
7. Disclaimer
- The data and calculations provided by the App are for informational and reference purposes only and do not constitute investment advice or a guarantee of results.
- The App shall not be liable for any service interruption, data loss, or other damages caused by force majeure, system errors, network issues, or third-party service disruptions, but will make reasonable efforts to restore service.
- Users are responsible for maintaining the security of their account information and devices. The App is not liable for any loss resulting from user negligence.
8. Limitation of Liability
To the maximum extent permitted by law, the developer and related parties shall not be held responsible for any direct, indirect, incidental, or consequential damages arising from the use or inability to use the App.
9. Privacy Protection
The App strictly complies with its Privacy Policy regarding the collection, use, and storage of user information. Please refer to the Privacy Policy for details.
10. Changes to the Terms
These Terms may be updated from time to time to reflect service changes or compliance requirements. Updated versions will be published within the App or on the official website and take effect immediately.
Continued use of the App constitutes acceptance of the updated Terms.
11. Governing Law and Dispute Resolution
- These Terms shall be governed by and construed in accordance with the laws of the People’s Republic of China.
- Any disputes arising out of or in connection with these Terms shall first be resolved amicably; if not possible, either party may submit the dispute to the court with jurisdiction in the developer’s location.
12. Contact Us
For any questions or suggestions regarding these Terms, please contact us via:
- Email: jafu_jin@hotmail.com
Thank you for your support of Duomi Compound Interest Calculator.