The Feynman Technique

Four steps to genuine mastery

The Feynman Technique is one of the most effective learning strategies ever documented. Teachback turns it into a 10-minute daily habit.

Pick a topic

Choose what you want to learn — a concept, a chapter, a skill. Teachback suggests review topics based on your history.

Teach it aloud

Explain the topic as if teaching a beginner. Your voice is transcribed on-device in real time using Whisper AI.

AI spots the gaps

The AI asks probing questions about anything you glossed over or got wrong — pinpointing exactly where your understanding breaks down.

Track your mastery

Each session generates a four-dimension mastery report. Spaced-repetition scheduling brings weak concepts back at the right time.

Features

Everything your brain needs

Voice-first interface

Just talk. Whisper on-device ASR transcribes your explanation in real time — no typing, no upload, no latency.

Adaptive AI questions

Questions are tailored to your subject (STEM, language, humanities) and escalate in depth as your mastery grows.

Mastery reports

Four-dimension scoring: accuracy, depth, coherence, and breadth. A circular progress chart shows your trajectory over time.

Spaced repetition

Teachback automatically schedules concept reviews at optimal intervals so knowledge stays in long-term memory.

Image context

Attach diagrams, textbook pages, or whiteboard photos so the AI asks questions grounded in your exact study material.

Bring your own key

Use OpenAI, Anthropic, or Gemini directly by entering your own API key. Or run fully offline with a local Ollama model.

Privacy First

Your voice stays on your device

Transcription happens locally using Apple's CoreML-accelerated Whisper model. Your recordings are never uploaded to any server.

On-device speech-to-text — no audio ever leaves your phone
All sessions and notes stored in a local SQLite database
Cloud AI optional — switch to local Ollama for 100% offline use
BYOK mode: bypass our servers entirely with your own API keys
No account required to use core features

Pricing

Start free, upgrade when you're ready

Every plan includes unlimited local sessions. Cloud AI sessions are shared with a generous free quota.

Free

Perfect for getting started

Gemini Flash Lite

50 cloud sessions / month
On-device Whisper ASR
Full mastery reports
Spaced repetition
Local Ollama support

Teach it back.
Learn it better.