Model Inventory is a free Android application developed by Woodland Scenics, designed to help model railroad enthusiasts keep track of their locomotives, rolling stock, structures, scenery, and accessories. With its simple and user-friendly interface, this inventory system allows you to create custom categories, log item purchase date and cost, store photos, and add notes, making it the perfect companion for train shows and swap meets.

The app's main interface is split into three sections: Categories, Items, and Photos. In the Categories tab, you can create and organize your custom categories, while the Items tab lets you log the details of each item, including its purchase date, cost, and notes. You can also add photos of the item in the Photos tab, making it easier to identify and track. Overall, Model Inventory is a great tool for model railroad enthusiasts who want to keep their collection organized and easily accessible.