SayFlow: AI Chat, Translate

BYOK AI chat and translator

Only for iPhone

Free

iPhone

SayFlow is a flexible AI chat app that lets you bring your own API keys and talk with multiple leading AI providers in one place. Chat with models from OpenAI, Anthropic, Google, xAI, DeepSeek, and on-device Apple Intelligence when available. Switch models by conversation, adjust reasoning and response settings, generate images, use voice input, and keep reusable prompts ready in your custom instruction library. SayFlow is built for people who want control over their AI workspace. Your API keys are stored securely on your device, and conversations are saved locally on your device. Key Features: • Chat with multiple AI providers in one app • Bring your own API keys • External web search model support • Switch models for different conversations • Use reasoning controls where supported • Generate images from prompts • Save and reuse custom instructions and skills • Use voice input for quick prompts • View estimated tokens and response metrics • Pin, search conversation, archive, export, and organize chats • Use on-device Apple Intelligence when available • Translate using the API of your selected model ...and more feature! SayFlow does not sell API credits or subscriptions. Usage of third-party AI services may require your own provider account, API key, billing setup, and agreement to each provider’s terms. SayFlow is an independent app and is not affiliated with OpenAI, Anthropic, Google, xAI, DeepSeek, or Apple. Terms of Use: https://saypop.kr/sayflow/terms/?lang=en Privacy Policy: https://saypop.kr/sayflow/privacy/?lang=en

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[v1.0.7] * Moved Gemini image models to the latest stable APIs and improved continuous image editing and model-specific aspect ratios. * Gemini Google Search responses now include sources and Search Suggestions. * The Translation Extension now follows reasoning effort, Thinking, and temperature settings more accurately. * Improved reasoning controls and automatic title generation for Grok 4.20 Multi-Agent. * Improved voice input reliability and privacy disclosures. * Fixed issues affecting provider requests, token metrics, caching, and conversation stability.

The developer, DONGHWAN CHOI, 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 Linked to You

    The following data may be collected and linked to your identity:

    • User Content
    • Search History
    • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
  • DONGHWAN CHOI
Size
  • 43.2 MB
Category
  • Productivity
Compatibility
Requires iOS 26.0 or later.
  • iPhone
    Requires iOS 26.0 or later.
Languages
English and 2 more
  • English, Japanese, Korean
Age Rating
13+
  • 13+
  • Infrequent
    Profanity or Crude Humor
    Mature or Suggestive Themes
    Horror/Fear Themes
    Medical Treatment information
    Alcohol, Tobacco, Drug Use or References
    Sexual Content or Nudity
    Guns or Other Weapons

    Contains
    Health or Wellness Topics
Copyright
  • © 2026 SAYPOP