VietProHub Products
HomeLive DemosPricingDocumentationMain Site

Live demo

Kaiwa Coach

Local-first Japanese pronunciation coach with an on-device Rust speech engine: DTW scoring, pitch contours, and signed lesson packs.

View Source Documentation
All demos
Advanced 18 minutes

What's inside

  • On-device pronunciation scoring
  • Per-mora timing and pitch feedback
  • Pitch Studio F0 contour view
  • Signed versioned lesson packs
  • Encrypted local storage
  • No audio leaves the device

Tech stack

FlutterRustFFIFirebaseRevenueCat

Related demos

Blog Platform

Full-featured blogging platform with markdown editor, comment system, and SEO optimization.

Real-time Chat App

Scalable chat application with real-time messaging, file sharing, and video calls.

NihonGO! AI Japanese Tutor

AI Japanese tutoring platform with 3D avatar conversation, real-time error correction, and FSRS spaced-repetition review across six languages.

VietProHub Products

Part of the VietProHub ecosystem — building innovative solutions for the future with modern technologies and best practices.

VietProHub Ecosystem

  • Main
    Central hub
  • Work
    Portfolio & services
  • Product
    SaaS solutions
  • Blog
    Tech insights

Stay Updated

Get the latest updates about our ecosystem and new features.

Subscribe via Email
© 2026 VietProHub.contact@vietprohub.com
Privacy PolicyTerms of Service