The developer has made OrSaveIt as easy to use as can be; but the actual saving is up to you.
We’re torn about Denominations: it’s a good guide to currency, but without a direct conversion mode, it’s unlikely to be of much practical use.
For simple updates, fine; but you won’t want to run your finances through this alone, and the desktop version is no powerhouse either.
There’s nothing not to like about Lemon. It just works, works well, and it’s free for most users.
A near perfect timesaver for regular eBayers and letter senders.
A brilliantly visual way to track your spending, even if it can be a little confusing at first.
In addition to having a comprehensive feature set, Back in Black has the advantage of portability: it's on the iPhone, so you can record expenditure everywhere.
BudgetBook doesn't have the prettiest interface, but it does allow you to track business and personal budgets, which is a bonus.