Open-source Android app auto-replies on WhatsApp via Gemini API with no ban risk
Prince_Nebhwani · reddit · 2026-10-04
Reddit user PrinceNebhwani released an open-source Android app that uses the Google Gemini API for intelligent WhatsApp auto-replies, positioning it against Play Store alternatives that charge $10/month for AI features.
- Uses Android's native NotificationListenerService to intercept and answer incoming messages — the same mechanism smartwatches and Android Auto use — which the author says avoids the ban risk of PC-side Python/Node scripts
- Connects directly to Gemini with the user's own API key, no middleman server; chat logs stay in a local SQLite Room database for full privacy
- Offers Professional, Casual, Friendly and Witty personality tones, plus custom system prompts
- Built with Jetpack Compose; code is available on GitHub
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