3.7 / 5

Receipt Brain

Watches your email for receipts, categorizes and logs them automatically

Useful

Privacy

The Problem

Expense tracking requires manual entry; receipts get lost; tax time is chaos

Current Solutions (Not Great)

Manual logging (inconsistent), Expensify (subscription + cloud), shoeboxes of receipts

Who Needs This

Freelancers, small business owners, anyone who needs expense records, tax-conscious individuals

Expense tracking is a chore everyone hates. Receipts pile up in email, you forget to log them, tax time becomes a nightmare. Receipt Brain monitors your inbox for purchase confirmations and receipts, extracts the relevant data (amount, vendor, category, date), and logs them to your preferred format. It handles the variety of receipt formats from Amazon to Uber to small vendors, learns your categorization preferences, and maintains a running expense record—all locally, so your purchase history never leaves your control.

Honest Take

Expensify, QuickBooks, and countless other expense trackers dominate this space with mature products and accountant integrations. The local-first privacy angle might appeal to freelancers and privacy-conscious users, but monetization will be tough competing against established free tiers and employer-paid solutions.

Monetization Ideas

Ways to turn this into revenue

Freemium

Free basic, $5-15/mo for pro

One-Time Purchase

$9-49 per license

Subscription

$5-29/month or $49-199/year

Features

Key features that make this app valuable

Email monitoring for receipt patterns
Data extraction (amount, vendor, date, items)
Automatic categorization
Learning from corrections
Multiple account support
Export to CSV/spreadsheet
Tax category tagging
Monthly/yearly summaries
Receipt image saving (when attached)

Build Prompt

Use this prompt with an AI assistant to start building

Build a Chrome extension called 'Receipt Brain' using WebInfer. Manifest V3 with activeTab, storage permissions. Target: Gmail web interface. Receipt detection: content script scans inbox/updates for receipt patterns—sender domains (amazon.com, uber.com, etc.), subject keywords ('receipt', 'order confirmation', 'payment'), email structure (itemized lists, total amounts). On receipt email detected, extract email body text. Use generateObject to return { isReceipt: boolean, vendor: string, amount: number, currency: string, date: string, items: [{ description: string, amount: number }], category: 'food'|'transport'|'shopping'|'subscription'|'travel'|'utilities'|'other', taxDeductible: boolean, confidence: number }. Store in IndexedDB: expenses table with all fields plus email reference. Dashboard popup: expense list sortable/filterable, monthly summary chart (by category), search, export CSV. Category editor: correct miscategorizations, system learns preferences. Tax mode: filter by deductible categories, generate tax report. Settings: which email accounts to monitor, category rules, ignored senders. Reconciliation: flag duplicates, merge records. All data local—export only when user explicitly requests.

Score Breakdown

Pain