Automating Your Work with Google Apps Script — The Complete Guide
How to automate repetitive work — orders, bookings, inventory, settlement, field input — with Google Apps Script (GAS). What it does, how far it stays free, and where it hits limits, in one place.
Conclusion first: Google Apps Script (GAS) is an automation tool that runs inside the Google account you already use. Build a tool once for repetitive work — orders, bookings, inventory, settlement, replies, field input — own it, and your monthly SaaS bill drops close to zero. This page is a map: it points you, in order, to the guides and tech notes worth reading.
Google Apps Script automation runs with no server bill, inside Google’s free quota, for small and ordinary workloads. Only bulk sending, org-grade features, and paid external APIs are exceptions — and those are weighed up front.
What you can build
Not a grand platform — small tools that remove the repetitive work in front of you. Orders and intake, bookings and scheduling, inventory and assets, settlement and reports, replies and alerts, field-input apps. You can see the shape of it on the home page.
- An app many people write to is designed differently from a solo one → How a Multi-User Inspection App Is Different
Cost: how far is it free
The most common question. The core: “it’s free because there’s no server to rent,” and the exceptions are weighed honestly up front.
- Why it’s zero and when that breaks → The Truth About Zero Upkeep
- How adding AI changes the cost structure → How Adding AI Changes Your Upkeep
- Outsource, build, or SaaS — which is cheaper → Outsource vs Build vs SaaS
What works, and where it stops
Automation isn’t a cure-all. Knowing the limits first saves wasted money.
- How far inventory in Sheets goes → Inventory in Google Sheets: How Far Automation Goes
- Signals you’ve outgrown GAS → When to Graduate from GAS
If you’re a developer building it yourself
For developers reviewing or building it, here are the pitfalls you’ll always meet in practice.
- Getting past the 6-minute execution limit → The 6-Minute GAS Limit
- Concurrent writes to the same sheet breaking → LockService and the 30-Run Ceiling
- The real cost behind slow sheet processing → Service Calls Are the Real Cost
- Where to store data → PropertiesService Is Not a Database · Stuffing JSON or Images into a Cell
- Handling external-call failures → Exponential Backoff and a Retry Budget
- Pinning the deploy URL → Your /exec URL Must Not Change
The full list is in Tech Notes.
One line
For small, repetitive work, building once and owning it is almost always cheaper than subscribing. Send one line about what you’d like to automate at contact, and we start by checking it fits the free quota.
Frequently asked questions
- What can I automate with Google Apps Script (GAS)?
- Repetitive work like orders and intake, bookings and scheduling, inventory and assets, settlement and reports, replies and alerts, and field-input apps. It's built as a small tool that runs inside the Google account you already use.
- How much does Google Apps Script automation cost?
- Small, ordinary workloads run at zero, with no server bill, inside Google's free quota. The only exceptions are bulk sending, org-grade features, paid external APIs, and the per-call fee when you add AI features.
- When is GAS not enough?
- At scale — hundreds of thousands of rows, dozens of concurrent edits per second, or real-time multi-location integration — you should move to an external database. We look at scale and concurrency before starting.