ALST: Open-source real-time Android screen translator using Jetpack Compose & Gemini Vision
navidsyn · reddit · 2026-08-29
A developer shared ALST, an open-source Android app that enables real-time screen translation using Jetpack Compose and Google Gemini Vision, eliminating the need for screenshots or app switching.
Key features include:
- Hybrid Inference: Uses Gemini 3.6 Flash for cloud-based single-pass vision extraction/translation; falls back to on-device ML Kit for offline use with <50ms latency.
- In-Place Overlay: Renders frosted translation cards directly over OCR bounding boxes via WindowManager.
- Zero-Leak Pipeline: Implements frame throttling and strict buffer management to prevent OutOfMemory crashes during continuous capture.
- Privacy First: Supports a Bring Your Own Key (BYOK) model for Gemini; no data is sent to third-party servers.
The project is open-source under MIT license.
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