InfiSpeak

InfiSpeak is a step-by-step language speaking app that takes you from listening and repetition to speaking feedback and real-world AI conversation.

Create your own TXT study files from the learning materials that matter to you. Listen, speak, repeat, and build practical language skills at your own pace.

■ Four-Step Training

• Training 1: Listen and Understand
Listen to sentences with native-language support and build comprehension.

• Training 2: Listen and Repeat
Hear each sentence, repeat it aloud, and develop pronunciation and speaking confidence.

• Training 3: Speak and Get Feedback
Look at a sentence in your native language, say it in your learning language, and receive scoring and feedback. Basic Mode works without an OpenAI API key. AI Evaluation Mode is available with an API key.

• Training 4: AI Role-Play Conversation
Practice real-world English conversations based on the selected Lesson and Focus. Training 4 is currently available for English conversation only and requires an OpenAI API key.

■ Key Features

• Multilingual learning support in Training 1–3
• Full Listening and Integrated Training
• Lesson-based sequential or random practice
• Repeat one sentence or an entire lesson
• Save and practice favorite sentences
• Track learning progress and study streaks
• Choose between default TTS and OpenAI voices
• Import your own TXT study files
• Export favorite sentences as a TXT file
• Generate natural expressions with “How Do I Say This?”

■ Create Your Own Learning Materials

Turn books, movies, YouTube videos, news articles, travel phrases, workplace expressions, and everyday conversations into personalized study files.

Write one sentence per line and separate the learning-language sentence from its native-language translation with the | character.

Learning language sentence|Native language translation

You can also organize your materials with Lesson and Focus headings.

■ OpenAI API Key

An OpenAI API key is optional.

Without an API key, you can use Training 1, Training 2, Training 3 Basic Mode, and standard repeat-learning features.

A personal OpenAI API key is required for Training 3 AI Evaluation Mode, Training 4 AI Conversation, OpenAI voices, and certain AI-powered features. OpenAI API usage may result in charges to your OpenAI account.

Start with one sentence a day. Small, consistent practice can grow into confident, natural speaking.

Recent changes:
• Fixed a crash that could occur when changing the main study file.
• The learning and native languages now update automatically based on the main study file.
• Training 3 transcriptions now use the learning language’s writing system.
• Training 4 role-play and guidance now use the selected learning language.
• AI Free Conversation now uses the selected learning language.
• Training 2 now prioritizes a connected Bluetooth headset microphone and plays the speaking cue after recording starts.