Free Enterpriser is the handy companion for your first (or next) FF4 Free Enterprise run. It keeps track of the essential checkpoints so you can dive in with ease even if you haven't played the vanilla game in a while, and it helps you avoid losing your place if you're busy and can't complete your run all at once. Based on your game type, it'll help you keep track of all the key item locations you've visited, as well as shops. Long-press any location to mark it for returning later- helpful if there's a shop with Artemis arrows to keep Rosa stocked, or if you get temporarily roadblocked by a MegaNuke-ing Wyvern.
Free Enterpriser also includes a quick reference of key locations and what blocks them, where to find monster-in-a-box chests and even a vanilla game summary so you can remember all the times and places Kain un-betrays you and why you need to visit Sheila twice.
This app is (obviously) not affiliated with the original game, or any official Free Enterprise community resources. It's just developed by someone who enjoys Free Enterprise and has a poor memory.