I hear you there, tools like Mint are more than sufficient for most people, however, it's not about how complicated are your finances (having multiple bank accounts, etc.), but whether you actually want to have a clear picture of your assets.
If you borrow your friend money, the fact that someone owes you that money is an asset. If you split rent with someone, and you don't settle it all immediately, that's also an asset or liability. If you do any independent work, double entry lets you realize that when you do the work, and then it's waiting in your receivables until you get paid. Someone pointed out that you don't usually have multiple accounts, but it doesn't have to be just bank accounts - we're talking broker accounts, retirement accounts, savings, credit cards, etc., transfers to these things should not show as expenses. Additionally, you can get smarter and (just like a business) remove money from your available pool, and budget for future.
To be fair, some single-entry bookkeeping tools probably implement some of these features, but in that case they really are just trying to simulate double entry bookkeeping.
On a higher level, I suspect that double entry for individuals would be more popular among HN crowd that in outside world; software is area that slightly selects for people being a little anal about code quality, getting all cases / code paths covered etc., and that is similar quality to wanting to make sure your accounts are in order.
If you borrow your friend money, the fact that someone owes you that money is an asset. If you split rent with someone, and you don't settle it all immediately, that's also an asset or liability. If you do any independent work, double entry lets you realize that when you do the work, and then it's waiting in your receivables until you get paid. Someone pointed out that you don't usually have multiple accounts, but it doesn't have to be just bank accounts - we're talking broker accounts, retirement accounts, savings, credit cards, etc., transfers to these things should not show as expenses. Additionally, you can get smarter and (just like a business) remove money from your available pool, and budget for future.
To be fair, some single-entry bookkeeping tools probably implement some of these features, but in that case they really are just trying to simulate double entry bookkeeping.
On a higher level, I suspect that double entry for individuals would be more popular among HN crowd that in outside world; software is area that slightly selects for people being a little anal about code quality, getting all cases / code paths covered etc., and that is similar quality to wanting to make sure your accounts are in order.