Hey Product Hunt 👋 The pain I keep hitting: anyone shipping a mobile product has to implement the **same domain three times** — multi-tenant Rails API, native iOS, native Android — and keeping them coherent under iteration is where weeks vanish. Most "AI builds an app" tools stop at a single web frontend. `nativeapptemplate-agent` is my answer. Tell it one English sentence — e.g. "a walk-in queue for a barbershop" — and it produces three coherent, buildable, validated projects: a Rails 8.1 API + native SwiftUI iOS app + native Jetpack Compose Android app. Renamed end-to-end. No contract drift. Structural + runtime + vision-judge validation built in. A few non-obvious things: ▸ Three distribution surfaces from one codebase — standalone CLI (npx), an MCP server (Cursor / Cline / Goose / any MCP-capable assistant), and a Claude Code plugin (/generate-app + /walk-app slash commands, including a UI walk on the simulator via mobile-mcp). ▸ Validated 12/12 end-to-end — three demo specs × two editions × two platforms, all passing structural + runtime + Opus-4.7 vision judge on a real iPhone 17 Pro simulator and Android emulator. Not mocks. ▸ Built on a production boilerplate — the agent customizes NativeAppTemplate (https://nativeapptemplate.com), the three-platform template I extracted from a queue-management app that's been live on both app stores for ~2 years. API + free-edition mobile clients are MIT; paid SKUs add multi-tenancy, invitations, role permissions. Built solo in Tokyo, powered by Claude Opus 4.7 + the Claude Agent SDK. Code, validation reports, and the planner / three-workers / reviewer / judge architecture are all on GitHub (MIT). Would love feedback on: - the planner → three-workers → reviewer → vision-judge architecture - whether the three-surface distribution (CLI / MCP / plugin) feels useful in your editor - what "simple-CRUD SaaS" specs you'd try first Happy to answer anything in the comments — replying live throughout the day.

NativeAppTemplate Agent

One sentence → Rails + SwiftUI + Compose Android. Free, MIT.

One sentence → Rails + SwiftUI + Compose Android. Free, MIT.