Credit card on the android app

There are advantages and disadvantages to each approach:

1- Save to APP:

Advantages: It is not necessary to retype information as it is saved directly to the mobile phone; Partially offline operation.

Disadvantages: Changing devices means retyping the data; Insecurity because the data is accessible to anyone who uses the cell phone; Cellular memory consumption for data storage

2- Save to WEB:

Advantages: It is not necessary to retype information as it is saved to a remote server; It does not use internal memory of the cellular to store the data; Security due to the storage of the information in a remote system associated to the user and not to the cell phone; You can use the app on any mobile device.

Disadvantages: Application only works with Internet access; Need to register information in a server registry; Latency when loading information from a remote server; Need authentication to gain access to remote server information.

You need to consider which disadvantages can be pitted depending on the purpose of the application. I usually choose to save on the WEB since nowadays virtually every application requires access to the internet.

Response

Conclusion

It is better to save the information in a web database by assuming and guaranteeing Information Security commitments with the client. And there is no way to save the credit card data in SQLite because to make a transaction or any other query using the credit card you need access to the Internet.