EVE Online is complicated. Every day you hear another story about some poor sap who forgot to update their clone and lost another skill that will take 2 months to retrain. Or you hear about that guy who forgot to check his galaxy map and got executed at a gatecamp. Fortunately, the EVE community has come up with some great apps to help you keep your feet under you.
iOS users will probably get a lot of mileage out of Neocom. Whatever you need to do, this app can handle it. You can manage skill training, plan skills out for months to come, track market data, even create custom ship fittings. The user interface is simple, but the sheer usefulness of this app more than makes up for the lack of sheen. If you prefer Android to Apple, Evanova offers almost all of the same functionality in a shinier package. Whatever your platform, these apps, and others like them, really help players manage their EVE accounts.
Disclosure: this author has, in the past, been paid to write for CCP, the developer behind EVE Online.