If the N9 has a version of JRE that runs on it (like the N900 does) you can run MoneyDance. I use that on my N900 and my Linux system at home. It also runs on Windows, Mac, or any device with a proper JRE, since it's 100% written in Java.

To be clear, I don't work for or promote for MoneyDance. I found them while looking for a Quicken replacement after they pissed me off a few years back. They're a commercial app, with a reasonable one-time fee, offer support and updates (and occasionally 1/2 price upgrades when they do a major update, which has only happened twice in 6 years). Best of all, unlike Quicken, they don't shut off service for older versions. They still support QIF, CSV, as well as other formats, like OFX and other open exchange formats.