Self-hosted · One-time purchase

Business tools you buy once and keep.

Yangang Software builds self-hosted invoicing, bookkeeping and tax-prep tools for freelancers and small businesses working across the US, Mexico and beyond. No subscriptions, and your financial data stays on your own computer.

  • Lifetime license
  • No monthly fees
  • Runs on your own machine
  • English · Español · 中文

Products

1099 Tax AI Tool product card

1099 Tax AI Tool

Track contractors and payments, see who crosses the $600 threshold, and export 1099-NEC data for your preparer.

$109 · lifetime license

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MSaaS-Invoice NA product card

MSaaS-Invoice NA

Invoice clients in USD or Mexican pesos, reconcile each period, and see your month at a glance, in English or Spanish.

$89 · lifetime license

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CrossBorder Tax Ledger product card

CrossBorder Tax Ledger

Track freelance income and expenses in USD, MXN and CNY with daily exchange rates, invoices and tax-period reports.

$99 · lifetime license

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Industrial Dashboard Kit live monitor

Industrial Dashboard Kit

A config-driven, real-time device monitoring dashboard for engineers and system integrators. No hardware required to start.

$79 · source kit

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About

Yangang Software is an independent software studio run by George Wang. Every product is a complete, self-hosted application: you download it once, run it on your own computer or server, and activate it with a lifetime license key.

We focus on the practical paperwork of small cross-border businesses: invoices, ledgers, exchange rates and year-end tax preparation, in the languages our customers actually work in.

How it works

  1. Buy through Lemon Squeezy or Gumroad. Your download link and license key arrive by email immediately.
  2. Install and start the app on your own computer (Node.js, about 5 minutes).
  3. Paste your license key into the app to activate it. Each key works on 2 computers and never expires.

Contact & support

Questions before buying, or help with installation and activation: email support@yangangsoftware.com.