What are some alternatives?
When comparing FileApp and FreeCommander, you can also consider the following products
Documents by Readdle - A central hub for all your files.
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
iFile - If you need a new file manager for your device, iFile might be the answer you seek.
XYplorer - File Manager for Windows
GoodReader - With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere.
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.