StashLine is an IOS app for long term personal finance planning and simulation. For me it was a challenge to make something that was polished, complete, visually appealing and well designed. Not to mention that I wanted it as a useful tool for myself. It's been reasonably popular with around 7500 lifetime downloads.
Check out the StashLine website for much more information. You can also check it out on the IOS app store.
It's not actively developed anymore because I consider it fairly complete. I might update it if an IOS update ever breaks it.
If StashLine interests you, check out my other financial visualization project IndexView.