Tutorials
Notes from building the templates.
Step-by-step guides on Flutter, Compose and shipping to the stores. Written while solving the problem, not after.
Multi-vendor deliveryMulti-vendor deliveryMulti-vendor delivery
Assigning Orders to Riders: Why Nearest-First Is the Wrong Algorithm
Dispatch is a matching problem, not a search problem. A three-second batch window, a cost function measured in seconds, and the Routes API bill that catches everyone.
12 Aug 2026 · 12 minWhat It Costs to Run a Multi-Vendor Delivery App: Firebase and Maps, Line by Line
Current Firestore, Realtime Database and Google Maps pricing applied to a thousand orders a month. The same app bills $21 or $1,770, and one await decides which.
12 Aug 2026 · 12 minSplitting a Cart Across Multiple Vendors: Data Model and Checkout Flow
One cart, several sellers, one payment, and every vendor fulfilling independently. The schema that makes it work, and the three places it usually breaks.
11 Aug 2026 · 11 min