About
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Haoduo Card is a credit card management app developed by experienced credit card users. It automatically calculates the longest interest-free period, manages bill repayment dates via a task list, and balances credit card groups by credit limit.
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Many experienced credit card users previously relied on Excel to manage their cards simply because there was no suitable app. I've tried many credit card management apps, but their creators are likely not heavy credit card users, so these apps always lack the key features that experienced users need.
For example, if I have 20 cards with different credit limits, and I want to split them into 3 groups with as equal total credit limits as possible, what should I do? Haoduo Card's "Credit Limit Balancing" feature can solve this problem.
What are the features of Haoduo Card?
- Exclusively designed for iPhone: A native app built with SwiftUI, small in size and lightning fast. All data is securely stored on your device via CoreData technology, no internet connection required for use.
- Meets the needs of experienced credit card users: Supports credit limit balancing to split cards into groups with as equal total limits as possible; supports credit limit statistics by bank.
- Smart repayment date calculation: Supports two modes: fixed repayment date and fixed interest-free period. Since different banks use different date calculation formulas, to avoid overdue payments, the app calculates all months as 30 days, and February as 28 days. If the calculated repayment date falls on the 31st, it will be automatically adjusted to the 30th.
- Your top priorities on the home screen: The app home screen displays the longest interest-free period and bills due within the next 7 days.
Where is user data stored?
- We know credit card information is highly sensitive private data, so all data is securely stored on your device, and will never be uploaded to us or any third parties.
Do I need to fill in all card information?
- No, only "Bank" is a required field.
- If you want to use the credit limit balancing feature, you need to fill in the "Credit Limit".
- If you want to use the interest-free period calculation and repayment reminder features, you need to fill in "Bill Date", "Repayment Date Type", and "Repayment Date".
Does the app require internet access?
- To ensure security, starting from version 1.4.1, the app no longer requests any network permissions. The three functions of submitting feedback, viewing the privacy policy, and viewing terms and conditions use the system's built-in Safari browser, so the app itself does not need internet access.
- Versions prior to 1.4.1 integrated Google Firebase Analytics and Google Firebase Crashlytics to collect app usage and crash data. This information is completely anonymous and contains no sensitive data. Denying network permissions will not affect the normal use of this app.
Are there ads in the app?
- No.
How does the app make money?
- Users need to purchase the app. In other words, we will never profit by collecting and selling users' personal privacy.
If you encounter any issues during use, you can contact us via the following methods:
- "Feedback" in the "Settings" page of the app
- "App Support" at the bottom right of the App Store page
