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EchoFlow
A fresh, native Android AI chat app that’s open-source, BYOK, locally stored, and ad-free.
Overview
EchoFlow reimagines AI chat on Android with a clean, native experience. Unlike typical web-based clones, EchoFlow is built from the ground up using Material Expressive design principles for a fluid, fun, and Android-native feel. It’s fully open-source and operates on a BYOK (Bring Your Own Key) model, giving you complete control over your API access. Conversations are stored locally on your device, allowing offline browsing of past chats. Responses are powered through OpenRouter, enabling access to a wide range of AI models without vendor lock-in. No tracking, no ads, no data leaves your device—just pure, private AI interaction.
Key Features
Open-source and fully transparent
Material Expressive design for native Android feel
Bring Your Own Key (BYOK) to OpenRouter
All chats stored locally on your device
Offline access to past chat history
No tracking, no analytics, no ads
Support for multiple AI models via OpenRouter
Customizable chat experience
Pros & Cons
Pros
- arrow_right + 100% private and offline-capable history
- arrow_right + Truly native Android experience with Material Expressive design
- arrow_right + Open-source fosters community trust and customization
- arrow_right + Flexible model selection through OpenRouter
- arrow_right + No recurring subscription costs (only pay for API usage)
Cons
- arrow_right - Requires manual API key setup
- arrow_right - No cloud sync; chats are device-specific
- arrow_right - Limited to Android only
- arrow_right - No built-in voice input or image generation (unless via OpenRouter models)
- arrow_right - Setup may be non-trivial for non-technical users
Pricing Details
EchoFlow is completely free and open-source. There are no subscription fees or in-app purchases. The only cost is the API usage via your own OpenRouter key (pay-as-you-go through OpenRouter).
FAQ
Do I need an API key to use EchoFlow?
expand_moreYes, you need an OpenRouter API key. The app is BYOK (Bring Your Own Key).
Is my chat data stored on servers?
expand_moreNo, all chats are stored locally on your device. Nothing is sent to any server except the API request to OpenRouter.
Can I use EchoFlow without internet?
expand_moreYou can browse past chats offline, but sending new messages requires internet to reach OpenRouter.
Is EchoFlow available on iOS?
expand_moreNo, EchoFlow is a native Android app only.
How do I get the app?
expand_moreYou can download the APK from the GitHub releases page or build from source.
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Host Your SaaS on Antigravity Cloud
Fast, secure, and developer-friendly hosting for modern web applications.