Credit Card Manager is an offline credit card management app that helps you keep track of your credit card information and reminds you of important due dates. Developed by TheSimplest.Net, this app does not require you to create an account or login online, ensuring that your information is secure.

The app is designed with simplicity in mind and is ad-free. It offers features such as due date reminders, the ability to record transactions, statement/outstanding balance estimation, and the option to mark payments as settled. It also shows statement/due/next due/cut off dates and sorts cards by the longest interest-free period.

Additionally, Credit Card Manager includes an annual fee waiver reminder and the ability to quickly add a card transaction from an SMS. The app offers backup and restore options to Dropbox or Google Drive, ensuring that your information is safe and secure.

It's important to note that as this app works entirely offline, the information presented depends solely on the information provided. If you want to see how much is charged per card, you'll need to manually enter and update each transaction, just like any expense manager. Overall, Credit Card Manager is a helpful tool for those looking to manage their credit cards offline, with a simple design and useful features.