live

LingoPT

AI-powered English speaking coach built as a Christmas gift for my mom

$ apt list --installed

AWSGenAIReactServerless

metrics.sh

$ metrics --project=lingopt

> AiModel: Claude 3.5 Sonnet

> AwsServices: 5 (Bedrock, Polly, Transcribe, S3, Lambda)

An AI-powered English speaking practice app I built as a Christmas 2024 gift for my mom. LingoPT combines speech recognition, Claude-powered feedback, and text-to-speech to create a personal English learning companion.

How It Works

•Practice Mode — Pick a prompt (or create your own), record yourself speaking, and get AI-generated feedback with corrections, explanations, and a natural audio playback of the improved version via AWS Polly
•Chat Mode — Ask an AI English teacher grammar questions, vocabulary help, or pronunciation tips, with context from recent practice sessions

Tech Stack

•Frontend: React + Vite, deployed on AWS Amplify
•Backend: Node.js/Express on AWS Lambda behind API Gateway
•AI: Claude 3.5 Sonnet via AWS Bedrock for feedback generation and Q&A
•Speech: AWS Transcribe (speech-to-text) + AWS Polly (text-to-speech)
•Storage: S3 for temporary audio processing

Key Features

•Cross-browser speech recording with multi-format support
•Structured feedback: encouraging comments, specific corrections with explanations, and an improved version
•Adjustable playback speed (normal & slow) for listening practice
•Dark mode support
•Fully serverless architecture

$ ls ./screenshots

practice-mode.png

LingoPT Practice Mode showing speech recording, AI feedback with corrections, and text-to-speech playback

Practice Mode — record speech, get AI feedback with corrections and a better version

chat-mode.png

LingoPT Ask Questions mode with AI English teacher chat interface

Chat Mode — ask grammar, vocabulary, or pronunciation questions

$git clone [private repository]