HackNao English
Offline-first · On-device AI

Fluent English with shadowing, listening, dictation & an AI coach

HackNao English trains your ear, voice, and writing with proven learning methods and an AI coach that runs entirely on your device. Private by design, fully usable offline.

Works fully offline Audio never leaves your device EN · VI · KO · JA interface

Scan to install

Point your phone camera at a code

App Store
Google Play
Four ways to practice

Learning methods that actually build fluency

Each method targets a different skill — combine them into a daily routine.

Method 01

Shadowing

Watch a short video and repeat after native speakers, sentence by sentence, to absorb their pronunciation, rhythm, and intonation.

  • Synced transcript highlights the current line
  • Tap any sentence to jump the video there
  • Repeat-sentence & 0.5×–1× playback speed
Method 02

Listening

Audio-first lessons grouped by topic. A persistent mini-player keeps playing in the background while you keep browsing.

  • Background audio with a pinned mini-player
  • Conversation transcript, sentence by sentence
  • Keyword tab to focus your vocabulary
Method 03

Dictation

Listen and type what you hear, line by line, then compare against the transcript to sharpen spelling, grammar, and listening accuracy.

  • Replay each line as many times as you need
  • Instant compare against the correct text
  • Builds spelling and active listening together
Method 04

AI Coach

Record your speech and get instant grammar and pronunciation feedback from an on-device AI — no audio ever leaves your phone.

  • Score, corrected sentence & teacher comment
  • Per-mistake explanations in your language
  • CEFR estimate (A1–C2) for every attempt
Try it right here

Practice Dictation & Shadowing live

Real lessons from the app's content — listen and type, or play a video and repeat after the speaker. No install needed.

Everything in one app

More than methods

A complete toolkit for steady, measurable progress.

Vocabulary topics

14 offline topic packs across everyday life, TOEIC, and IELTS — with IPA, meanings, and example sentences.

CEFR level test

A four-skill placement test (Reading, Writing, Listening, Speaking) that estimates your level from A1 to B2.

Learning dashboard

A streak card, daily stats, and a weekly activity chart keep you motivated and on track.

Themes & dark mode

Multiple color presets with Light, Dark, and System appearance that follows your OS.

Your language

A fully localized interface in English, Vietnamese, Korean, and Japanese, switchable anytime.

Private & on-device

Speech recognition and grammar analysis run locally. Your recordings stay on your phone.

100%
Offline-capable
4
Learning methods
4
Interface languages
A1–C2
CEFR coverage
Get started in minutes

How it works

A simple loop that turns minutes a day into real progress.

1

Pick a method

Choose shadowing, listening, dictation, or the AI coach based on the skill you want to build today.

2

Practice daily

Run short, focused sessions. The mini-player and synced transcripts keep practice effortless.

3

Track progress

Watch your streak grow, review your stats, and re-take the CEFR test to see your level climb.

Start learning English the smart way

Bring shadowing, listening, dictation, and an on-device AI coach everywhere you go.

Point your phone camera at the code to install the app.

Open the install link