CardWin - Credit Card Tracker
iPhone / Utilitaires
Most people with multiple credit cards leave interest-free days on the table -- every single time they swipe. CardWin fixes that with one glance.
Just enter the billing day and due day for each of your cards. CardWin calculates which card gives you the most interest-free days for any purchase today, and shows you the answer the moment you open the app.
No mental math. No spreadsheets. One clear recommendation, every morning.
-- Key Features --
Daily Recommendation
See which card to use today at a glance. The recommended card, interest-free days, and due date are displayed prominently on the home screen with a beautiful card interface.
Card Management
Add, edit, and delete your credit cards with their billing and due dates. Tap any card to update its details. Supports both same-month and next-month due date configurations to accommodate different billing rules.
Optimization Calendar
Browse daily card recommendations for the next 30 days. View a full 365-day annual distribution showing how often each card is recommended. Check per-card statistics with interest-free day totals -- all organized into three clean, focused pages.
Smart Reminders
Get notified before each due date so you never miss a payment. Daily morning notifications tell you which card to use today and how many interest-free days you'll get. Customize reminder timing and notification hours in settings.
Home Screen Widgets
Small and medium home screen widgets let you check today's best card and interest-free days without even opening the app. Widgets update in real time whenever your cards change.
Dual Themes
Choose between two beautifully designed color themes -- a deep navy blue or a vibrant coral pink -- to personalize your experience.
Bilingual Interface
Full Chinese and English language support. The app automatically matches your system language on first launch, and you can switch anytime in settings.
iCloud Sync
Your card data syncs automatically via iCloud across all your devices. You can also turn sync off in settings to keep data local only.
-- Why CardWin --
Precise: Correctly handles month boundaries, varying month lengths, leap years, and all edge cases in billing cycle calculations.
Simple: No complicated setup. Add a card with its billing day and due day, and you are good to go.
Private: All data is stored locally on your device and in your personal iCloud account. No data collection, no third-party analytics, no tracking whatsoever.
Ad-free: A completely clean experience with no ads, no pop-ups, and no in-app purchases.
Polished: Modern iOS design with smooth animations, haptic feedback, and an interface that feels right at home on your iPhone.
Whether you carry two cards or ten, CardWin helps you pick the smartest choice every single day.
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Note: CardWin is a billing date calculator. It does not connect to any bank, access financial accounts, or process transactions. All data is manually entered by you and stored only on your device and in your personal iCloud.
Quoi de neuf dans la dernière version ?
Bug fixes and experience optimization
