---
title: "SayFlow: AI Chat, Translate - Reviews, Revenue and Downloads in Japan | Apple App Store"
description: "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 "
---

# SayFlow: AI Chat, Translate — Japan

![SayFlow App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/38/8a/2b/388a2bf9-cc60-946d-7313-1e0384d6f4ad/sayflow-0-0-1x_U007ephone-0-1-0-sRGB-85-220.png/434x0w.png)

**Developer:** [DONGHWAN CHOI](https://apptail.io/developer/donghwan-choi-AhuFlc) (South Korea)
**Category:** Productivity
**Rating:** N/A (0 ratings)
**Price:** Free
**Bundle ID:** com.saypop.SayFlow
**Store:** Apple App Store
**Country:** Japan
**Version:** 2.1.0 (released 2026-11-11)
**Original Release:** 2026-05-07
**Languages:** English, Japanese, Korean

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/jp/app/app/id6766947682)
**AppTail Page:** [https://apptail.io/app/sayflow-ai-chat-translate-kTKA/japan](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/japan)

## SayFlow Description
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, create and edit images with GPT Image, Nano Banana, and Grok, talk with AI in realtime voice conversations, connect MCP servers to give AI new tools, 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
• Have realtime voice conversations with GPT, Gemini, and Grok
• Generate and edit images with reference photos, and browse them all in the Images tab
• Connect remote MCP servers so AI can use their tools, with optional confirmation before each tool runs
• Add web search to supported models
• Choose a different model for each conversation
• Adjust reasoning where supported
• See what the AI is doing in real time: thinking, using tools, or writing a response
• Attach photos and files, or send them to SayFlow from the share sheet
• Save and reuse custom instructions, and import skills from Files or GitHub
• Use voice input for quick prompts
• Automatically compress long chats to keep context focused
• View estimated tokens, costs, and response metrics
• Pin, search, archive, and export your chats
• Translate text with your selected model
• Start a secret chat that isn't saved
• Personalize with alternate app icons, including hidden ones to unlock
...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: 
Privacy Policy: 

## SayFlow Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/1d/a4/27/1da427f3-0c73-1964-8e65-2623a666270f/4.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/5d/bf/d7/5dbfd78a-4e4c-3488-33c4-d104bcf7ff24/3.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/5d/3d/5e/5d3d5e7b-adb7-0679-dfce-2b6f144697c0/5.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/23/7d/de/237ddeb9-0e91-cfa4-e914-02630ce3384f/1.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/14/97/ff/1497ff9f-d07f-4ee4-b482-d7ec622f8832/2.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/92/41/47/92414732-a522-3ffe-3fc9-1c62ef1fb454/6.png/1284x2778.png)







## SayFlow Available In
- [Brazil](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/brazil)
- [Israel](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/israel)
- [Jordan](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/jordan)
- [Japan](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/japan)
- [South Korea](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/south-korea)
- [Saudi Arabia](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/saudi-arabia)
- [Tunisia](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/tunisia)
- [United States](https://apptail.io/app/sayflow-ai-chat-translate-kTKA/united-states)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*