ServiceTitan provides two main features to help you manage inventory and purchasing across your business:
Purchasing Module
The Purchasing module is your central hub for procurement. It allows you to:
Create and send purchase orders (POs) to vendors
Get notified when items are consumed
Send replenishment orders to restock items
Track receipts, returns, and expenses
Inventory Module
The Inventory module builds on the Purchasing module and provides deeper inventory management tools. It allows you to:
Monitor inventory levels in trucks and warehouses
Set minimum stock levels for automated replenishment
Receive alerts when stock is low
Manage serialized inventory to track individual items
Perform regular inventory counts to ensure accuracy
Use units of measure to define how items are tracked and used

Note:
Effective use of the Inventory module depends on a good foundation using the Purchasing module. After you are comfortable using Purchasing, review the steps to Set up Inventory and select an Inventory implementation path.
If you haven't enabled the Inventory feature, the main menu and settings menu display an option for Purchasing. If the feature is enabled, it displays as Inventory.
Additional Inventory features
Use Inventory Requisition to automate purchasing and optimize stock usage, keeping your stock levels efficient.
Use the Inventory Mobile app to track and manage today's purchase orders (POs), transfers, and inventory counts both completed and in progress.
Purchase Orders (legacy)
Caution: Articles in this section introduce the older version of the Purchase Order (PO) feature.
Troubleshooting and FAQ
FAQ
The FAQ section provides answers to common questions about POs, replenishment, inventory tracking, and setup best practices.