Afina AI

The prompt engineering lab for AI developers

Test your prompts across Claude, OpenAI, Gemini, and Apple On-Device AI. Compare responses side by side.

Real-time token counting and cost estimation. Know exactly how much each prompt costs before sending.

Keep track of all your prompt iterations. Easily compare and revert to previous versions.

API keys stored securely in Keychain. Use on-device AI for sensitive prompts that never leave your device.