Turning grocery order history into savings, spending insights, CO2 tracking, and nutrition analysis

What it does

Odalytics is a Chrome/Edge extension + web dashboard for customers of Oda (Norway's largest online grocery store). You install the extension, it syncs your order history, and you get:

• Full spending breakdown (by month, category, product) going back years
• Price tracking across every product you've ever bought
• CO2 footprint estimates for every item (matched against the Danish Climate Database's 505 food entries)
• NOVA food processing classification (unprocessed to ultra-processed) for health trends
• Smart shopping list that knows when you're due to restock staples
• Product ratings and reviews (Oda has none natively -- we're the only source of product reviews for Oda shoppers)
• "Wrapped"-style yearly/monthly stats you can share
• Anonymous benchmarking against other users with same household size
• Public market insights page with basket price index, shrinkflation detection, and fee trends

Everything is free.

The interesting technical bits

• Browser extension (WXT framework, Manifest V3): The extension synchronizes orders from the user's Oda account. The service worker handles sync as a resumable state machine -- MV3 kills workers after ~30 seconds, so every step is persisted to chrome.storage.local and resumed via chrome.alarms. Each batch is idempotent (ON CONFLICT upserts), so interruptions are safe.
• AI enrichment pipeline: When a new product appears, a Postgres trigger fires, enqueues it, and pg_net calls a serverless worker. Claude Sonnet classifies 25 products per batch across three dimensions simultaneously: NOVA group (1-4), best-matching CO2 reference entry from 505 Danish Climate Database items, and country of origin. Products with no direct CO2 match get a second LLM call that decomposes them into weighted ingredients. Cost: ~$0.001/product.