Compose Booster
Productivity
Only for Mac
Free
Mac
AI-powered email assistant - improve, polish, and customize your emails with advanced AI models
Transform your email writing with Compose Booster, an intelligent desktop assistant that helps you craft professional, polished emails in seconds.
Key Features:
* Multiple AI Models - Choose from leading AI models including Claude, GPT-4, Gemini, and more through OpenRouter
* Quick Actions - One-click buttons for common tasks: Improve, Make Professional, or Make Concise
* Custom Prompts - Create and save your own writing prompts for repeated use
* Tone Control - Adjust the tone of your emails from formal to friendly, assertive to empathetic
* Light & Dark Themes - Comfortable writing experience in any lighting condition
* Privacy-Focused - Your API key is encrypted locally; emails are only sent to your chosen AI provider
How It Works:
1. Paste your email draft
2. Select an AI model, prompt, and tone
3. Click a quick action or "Boost" button
4. Copy the improved result
Requirements:
* OpenRouter API key (free to sign up at openrouter.ai)
* Pay only for what you use - typically fractions of a cent per email
Perfect for professionals, customer service teams, and anyone who wants to communicate more effectively.
Ratings & Reviews
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The developer, Stephen Le, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Stephen Le
- Size
- 236 MB
- Category
- Productivity
- Compatibility
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- Languages
English and 51 more
- English, Afrikaans, Amharic, Arabic, Bengali, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Filipino, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Latvian, Lithuanian, Malay, Malayalam, Marathi, Norwegian Bokmål, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Simplified Chinese, Slovak, Slovenian, Spanish, Swahili, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2025 Stephen Le