KaeKal

I've been using this app for years (since the Flex Wallet days!) and it keeps getting better. I rely on it for work as a consultant. The ability to sync across all my devices is invaluable. Over the last few years I've started separate wallets to keep track of family and friend info (sizes, favorites, brands, that kind of thing). It is easy to define categories and what info to track. I've never used another app as I've never needed to, but I've seen apps others use and I think this one wins hands down. I highly recommend it.