I used to use this pretty thoroughly but a few issues have caused me to stop altogether now:
* Flash app means that in newer versions of Android (edit: 6+ IME), even with an old Adobe Flash for Android apk loaded and with Firefox, the functionality no longer works in mobile (input functionality is broken.)
* Cards used for time-limited recurring expenses (subscriptions that I intend to end in 1 year, for example) would arbitrarily fail transactions resulting in hassle. Since each number was locked to the processor who requested the first transaction, I suppose one reason this happened was if a business switched processors mid-stream.
I have always wondered why no one has created a nice mobile solution for this very useful feature. It seems that credit cards want each customer to just use one number and trust that their risk department will stop data leaks - seems like a bad solution.
* Flash app means that in newer versions of Android (edit: 6+ IME), even with an old Adobe Flash for Android apk loaded and with Firefox, the functionality no longer works in mobile (input functionality is broken.)
* Cards used for time-limited recurring expenses (subscriptions that I intend to end in 1 year, for example) would arbitrarily fail transactions resulting in hassle. Since each number was locked to the processor who requested the first transaction, I suppose one reason this happened was if a business switched processors mid-stream.
I have always wondered why no one has created a nice mobile solution for this very useful feature. It seems that credit cards want each customer to just use one number and trust that their risk department will stop data leaks - seems like a bad solution.