Alexandr Thanks for the quick reply, Alexandr!
TBH, it took me a while to understand the categories tab even after using the demo DB (and I do consider myself not a stupid person lol).
I suggest adding a 'Budget' column to the Categories table (much easier to see all the categories and their budget in case you're working on editing the categories and want to have more info presented and will save a double-click on each category to see the Budget value I set.
A side question, If I want to have both an iPhone app and the Mac OS client, do I need to pay for two separate subscriptions?