Everything you need to sound like your best self
One coach, three systems: refine in the moment, understand how you land, and train away your weak spots for good.
Voice coaching
Speak naturally and watch your words transform. Your recording is transcribed securely inside Haru’s own AWS account and never stored — then Haru strips filler words, removes hedging, and rewrites for your audience.
- In-browser transcription
- Live waveform & level meter
- Pick any microphone
Text refinement
Paste an email, Slack draft, or proposal. Choose your audience and goal, and get a polished rewrite streamed back in seconds — with an inline diff showing exactly what changed and why.
- Audience & goal targeting
- Scenario templates
- Inline word-level diff
Tone scores
Every refinement is scored on confidence, diplomacy, and clarity, with a one-line "how this will land" read of your message from the receiver's perspective.
- Confidence · Diplomacy · Clarity
- "How this lands" summary
- Trend chart on your dashboard
Learning engine
Haru logs your recurring weak phrases and turns them into personalised flashcards, scheduled with the SM-2 spaced-repetition algorithm so fixes actually stick.
- Cards built from your real mistakes
- Again / Hard / Good / Easy ratings
- Due-today queue
Hear it out loud
Play any refinement with your browser's built-in voice for free, or switch to the high-fidelity Neural AI voice (Amazon Polly) when you're rehearsing something that matters.
- Standard voice — free, unlimited
- Neural AI voice — studio quality
- Choose your output device
Session history
Every refinement is saved and searchable. Filter by voice or text mode, revisit old rewrites, and watch your scores climb over time.
- Full-text search
- Mode & date filters
- Score trends
Built on three promises
Private by design
Voice audio is transcribed without being stored. Your content is never used to train AI models, and there are no tracking cookies.
Pay per use
15 free credits every month, every feature unlocked. Buy credits only when you need more — no subscription, no auto-debit.
Powered by Claude
Refinements run on Anthropic's Claude models via Amazon Bedrock — fast for everyday rewrites, deeper for high-stakes polish.