Track expenses from LINE: AI extracts data from message

This automation template solves the problem of fast and accurate expense tracking via the LINE messenger — ideal for those who want to avoid manual data entry. The system receives text messages and receipt images, analyzes them using AI (GPT-4), extracts structured information, and saves it to Google Sheets while preventing duplicates.

## Who it´s for
- Individuals tracking personal expenses via LINE
- Freelancers needing automatic expense logging
- Small businesses in Asia using LINE as their primary messenger
- Accountants processing numerous receipt images
- Users wanting to integrate LINE with Google Sheets without manual input

## What the automation does
- Receives incoming messages and images via webhook from LINE
- Analyzes content using LangChain and GPT-4: determines if it’s a receipt or expense note
- Extracts structured data: date, amount, category, etc.
- Checks Google Sheets for duplicates before adding new entries
- Logs unique records into Google Sheets
- Sends feedback in LINE: success, duplicate, or irrelevant content

## What´s included
- Ready-to-use n8n workflow
- Logic for processing text and image inputs
- Integrations with LINE, Google Sheets, and OpenAI API
- Basic setup and adaptation guide

## Requirements for setup
- n8n account with access to HTTP triggers
- LINE account with configured provider and bot
- Google Sheets access (Google Workspace or personal account)
- OpenAI API key (for GPT-4 usage)

## Benefits and outcomes
- Fully automated expense tracking without manual entry
- High accuracy in data extraction powered by AI
- Protection against duplicate entries in sheets
- Support for bilingual prompts (English and Chinese)
- Fast processing of both text and receipt images
- Convenient confirmation of actions directly in LINE

## Important: template only
Important: you are purchasing a ready-made automation workflow template only. Rollout into your infrastructure, connecting specific accounts and services, 1:1 setup help, custom adjustments for non-standard stacks and any consulting support are provided as a separate paid service at an individual rate. To discuss custom work or 1:1 help, contact via Telegram: @gleb923.