Pick the gear you want to craft in MapleStory Classic World, enter what's already in your ETC bag, and get the cheapest route: what to farm, what to smelt, how to level your crafting, and the order to do it all in.
Same for every discipline. NiaMeowDB's table undercounts most levels, so values checked in game replace it, and levels not yet checked are estimated from the growth pattern of the ones that were. If you measure a level yourself, type the EXP in and the planner uses yours.
Lv is the equip level. "vs shop" compares the mesos you spend crafting from raw mats against the NPC price at Flora, Serabi and friends, where the item is sold.
Enter ores, drops and anything you've already crafted. Ticking steps in the plan updates this for you. Items your plan uses are marked, and only those plus what you're carrying are listed. Search or use "Not listed?" for anything else. The planner spends what you have before asking you to farm more.