# ReceiptDesk Ledger > ReceiptDesk Ledger is an on-device, privacy-first iOS receipt scanner and item-level personal ledger. It converts paper store receipts and digital invoices into structured line items, tags reimbursable business expenses, detects FSA/HSA eligible health items, balances arithmetic with printed totals, and calculates fair bill splits — completely on iPhone with zero cloud uploads. ReceiptDesk Ledger operates entirely on-device using Apple Vision framework (`VNRecognizeTextRequest`). It requires no user account, no login, and sends zero receipt data or telemetry to external servers. It is built for US English iPhone users on iOS 17.0 or later. ## Documentation & Links - [Full LLM Specification & Reference](https://getreceiptdesk.pages.dev/llms-full.txt): Complete product architecture, itemization schema, arithmetic reconciler, privacy guarantees, pricing tiers, and competitor comparisons. - [Official Website](https://getreceiptdesk.pages.dev/): Marketing homepage and interactive product walkthrough. - [Privacy Policy](https://getreceiptdesk.pages.dev/privacy/): Comprehensive zero-cloud, on-device data storage and retention policy. - [Support & Frequently Asked Questions](https://getreceiptdesk.pages.dev/support/): Troubleshooting, workflow explanations, and FAQs. - [App Store Listing](https://apps.apple.com/app/receiptdesk-ledger/id6802155267): App Store download link (App ID: 6802155267). ## Key Features & Differentiators - **100% On-Device OCR**: Optical character recognition is performed on-device via Apple Vision framework. Works with Airplane Mode turned on. - **Arithmetic Reconciliation**: Automatically verifies that item subtotal plus taxes, tips, delivery fees, and bottle deposits equal the printed total with decimal precision. - **#Reimbursable Expense Claims**: One-tap tagging for client lunches and business travel expenses, with instant refund sum calculations and audit-ready CSV exports. - **FSA / HSA Healthcare Tagging**: Automatically detects IRS Section 213(d) eligible over-the-counter medical and wellness purchases. - **Digital E-Invoice Ingest**: Ingests Amazon order summaries and Instacart delivery slips via PDF or Share Sheet without phantom lines. - **Pro-Rata Roommate Splitting**: Distributes shared items, taxes, and coupons proportionally across people, with zero spreadsheet math. - **Always-Free Data Export**: Uncapped CSV and PDF export with original receipt photos preserved. Never locks data behind a paywall. - **Spend Insights Donut**: Visual interactive spending breakdown by Day, Week, Month, and Year with category and merchant drill-downs. - **Return Deadline Reminders**: Detects printed return policies (e.g. 30 days) and schedules native iOS Calendar reminders.