CardBiller

【CardBiller】is a minimalist app dedicated to helping you clearly manage your prepaid, annual, monthly, or usage-based cards. For prepaid cards, you can track your deposits and bonus credits; for annual/monthly cards, you can monitor expiration dates; and for annual/monthly/usage-based cards, you can easily convert remaining time or usages into monetary value.

By recording each expense, CardLedger helps you identify impulsive spending traps, avoid hidden waste, and rationally control your recharge budget. It supports asset statistics, managing multiple cards, and exporting detailed transaction records—freeing you from recharge addiction and overspending anxiety!