"Quicken is a single-entry accounting system, which means that amounts can appear out of or disappear into thin air. In a double-entry accounting system you can

"Quicken is a single-entry accounting system, which means that amounts can appear out of or disappear into thin air. In a double-entry accounting system you can't put amounts in an account without taking it out of another account." This summed it up nicely, from https://github.com/mortisj/quicken2beancount https://github.com/mortisj/quicken2beancount