SayFlow: AI Chat, Translate

BYOK AI chat and translator

Only for iPhone

Free

iPhone

SayFlow brings leading AI models together in one flexible chat app. Use your own API keys for cloud models, or run AI right on your iPhone. No account or subscription required. Chat with models from OpenAI, Anthropic, Google, SpaceXSI, and DeepSeek, or download open-weight models that run entirely on your device, alongside Apple Intelligence when available. Choose a model for each conversation, adjust reasoning and response settings, generate images, and keep your favorite 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 in the Keychain, and your conversations stay on your device. When you use a cloud model, your messages are sent only to the provider you choose. Key Features: • Chat with multiple AI providers in one app • Bring your own API keys • Run open-weight models on device, or import your own GGUF models • Use on-device Apple Intelligence when available • Add web search to supported models • Choose a different model for each conversation • Adjust reasoning where supported • Generate images and attach photos and files • Save and reuse custom instructions and skills • Use voice input for quick prompts • Automatically compress long chats to keep context focused • View estimated tokens and response metrics • Pin, search, archive, and export your chats • Translate text with your selected model • Start a secret chat that isn't saved ...and more. SayFlow does not sell API credits or subscriptions. Using 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, SpaceXSI, 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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[v2.0.2] What's New • New models arrive faster. SayFlow now keeps its model list up to date automatically, so new models from OpenAI, Anthropic, Google, SpaceXSI, and DeepSeek can show up without waiting for an app update. • Support Anthropic 'Claude Haiku 5.5'. Claude Haiku 4.5 is now under Others. • Support Google 'Gemini 4 Argon' and 'Nano Banana 2.1'. • Support OpenAI 'GPT-6.1 Sol'. • Translation from other apps now uses the same reasoning and temperature settings as your chats. • Removed the custom model name field. Choose models from the list instead. • Sending the first message in a new chat now animates smoothly, and the keyboard stays open. • Fixed an error that could stop Claude from replying after it used web search or skills. • Grok searches the web and X faster and uses far fewer tokens per question. • Error messages from Grok now explain what went wrong, like running out of credits, instead of showing only an error code. • A fresh look for chat bubbles • The reasoning bubble is now a round, puffy thought cloud, just like a comic. • Stability improvements and bug fixes.

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
58 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