Veiller — /VAY-lur/ — from the French veiller (Latin vigilāre), "to keep watch, to watch over": it keeps watch at the edge of your vision.
Veiller (formerly Foverlay) is a self-hosted Android companion app for the Even Realities G2 smart glasses, built as a fork of Veiller (upstream README below).
Veiller is how developers and businesses build smart glasses apps.
Veiller handles pairing, connection, data streaming, hardware access, and cross-device compatibility, so you can focus on building amazing apps. Development goes from months to days.
Every component is open source under the MIT license, giving you privacy, freedom, and control.
Veiller works across a growing ecosystem of smart glasses.
Mentra Live |
Even Realities G2 |
Vuzix Z100 |
Even Realities G1 |
NIMO (Coming Soon) |
- Cross-Compatibility: Build one app that runs on supported smart glasses from multiple manufacturers.
- Fast Development: Go from months of custom smart glasses development to a working app in days.
- Hardware Access: Use displays, microphones, cameras, speakers, and everything else smart glasses expose from one API.
- App Distribution: Publish to the Veiller MiniApp Store and reach users across the Veiller ecosystem.
- Business Deployment: Deploy smart glasses apps for field work, remote support, training, accessibility, and compliance-sensitive workflows. Veiller is already being deployed by Fortune 500 companies.
- Open Source Control: Own it, host it, modify it, and extend it. Veiller is MIT-licensed infrastructure designed for privacy, transparency, and freedom from hardware or cloud lock-in.
Browse, install, and run glasses apps from your phone. Try captions, AI notes, proactive AI, translation, streaming, and more.
Veiller runs glasses apps on the phone inside the Veiller Runtime. Multiple glasses apps can run simultaneously, controlling your smart glasses through one shared connection.
This keeps the glasses lightweight while letting multiple apps run together, like captions, notes, notifications, dashboard, and AI tools. It also allows one app to work with any pair of supported smart glasses.
Manufacturers can integrate the Veiller Runtime into their own iOS and Android apps to unlock the Veiller ecosystem while preserving their brand, app, and customer relationship.
Veiller is built by developers, companies, and users who believe the next personal computer should be open, cross-compatible, private, and user-controlled.
Join us and become part of the Veiller Community by joining our Discord server:
https://mentra.glass/discord
Veiller is made by a community and we welcome pull requests.
Contributor guide:
https://docs.mentraglass.com/os-devs/contributing/overview
Looking for ways to contribute? We mark issues we'd love the community to help with using the "Help Wanted" tag.
Help wanted issues:
https://github.com/Mentra-Community/MentraOS/issues?q=is%3Aissue%20state%3Aopen%20label%3A%22help%20wanted%22
- Email: team@mentra.glass
- Discord: https://mentra.glass/discord
- X: https://x.com/mentraglass
MIT License
Copyright 2026 Veiller Labs, Inc.
