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Umbra
an autonomous agent that lives on your Android phone
Tell Umbra what to do. It works in the background, operates apps for you, builds and tests code in a real Linux environment on the same phone, checks its own work, and asks before anything risky.
I'm Pinyen Cheng, a high school student and indie developer from Taiwan. I'm excited to introduce Umbra, an open-source autonomous AI agent that actually lives and works on your Android phone.
I've always wondered: Why do we have such powerful computers in our pockets, yet most AI assistants can barely do anything beyond answering questions?
That's why I built Umbra.
Here's what makes it different:
📱 Real Android control — Umbra can navigate apps, tap, type, scroll, and interact with your phone autonomously.
💻 A full Linux environment — It can write code, run terminals, build software, and execute real development workflows directly on your phone.
⚡ True background execution — Let your agent work while you continue using your phone.
🧠 Bring your own AI — Connect your preferred models through Anthropic, OpenAI, Google, or compatible providers.
🔐 You're in control — Sensitive actions require approval, and you can stop the agent and revoke its access.
It's open-source under the MIT license, and root is optional.
This is an early project, and there's still plenty to improve. I'd love to hear your thoughts, especially:
What would you actually want an autonomous AI agent to do on your phone?
“an autonomous agent that lives on your Android phone”
Umbra was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #150 on the daily leaderboard. Tell Umbra what to do. It works in the background, operates apps for you, builds and tests code in a real Linux environment on the same phone, checks its own work, and asks before anything risky.
On the analytics side, Umbra competes within Android, Open Source, Artificial Intelligence and GitHub — topics that collectively have 652.1k followers on Product Hunt. The dashboard above tracks how Umbra performed against the three products that launched closest to it on the same day.
Who hunted Umbra?
Umbra was hunted by Pinyen Cheng. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Umbra including community comment highlights and product details, visit the product overview.
Pinyen Cheng
Hey Product Hunt! 👋
I'm Pinyen Cheng, a high school student and indie developer from Taiwan. I'm excited to introduce Umbra, an open-source autonomous AI agent that actually lives and works on your Android phone.
I've always wondered: Why do we have such powerful computers in our pockets, yet most AI assistants can barely do anything beyond answering questions?
That's why I built Umbra.
Here's what makes it different:
📱 Real Android control — Umbra can navigate apps, tap, type, scroll, and interact with your phone autonomously.
💻 A full Linux environment — It can write code, run terminals, build software, and execute real development workflows directly on your phone.
⚡ True background execution — Let your agent work while you continue using your phone.
🧠 Bring your own AI — Connect your preferred models through Anthropic, OpenAI, Google, or compatible providers.
🔐 You're in control — Sensitive actions require approval, and you can stop the agent and revoke its access.
It's open-source under the MIT license, and root is optional.
This is an early project, and there's still plenty to improve. I'd love to hear your thoughts, especially:
What would you actually want an autonomous AI agent to do on your phone?
GitHub: https://github.com/chengmatt416/...
Thanks for checking it out! 🚀