I purchased vCarder a while ago and there haven't been any updates. Is it still in development?
No, we pulled vCarder from the iTunes AppStore and then stopped development after a maintenance phase. If your iPhone breaks, you can restore vCarder from the backups iTunes makes of your device, but it isn't available for download from the AppStore anymore and we don't have any way of providing a download outside of it.
vCarder was developed and tested with iOS 2, compatibility with later versions may stop at some point.