Running Letta on Android: The Full Termux + Proot Guide

From Concept to Documented

When the Android bootstrap landed in the installer repo in early February, it was an experiment. The February 28 update turns it into a real guide: full documentation, an installer script, and a plan document covering the quirks of running Letta inside Termux's proot environment.

How It Works

1. Install Termux from F-Droid (not the Play Store version — it's outdated).
2. Use proot-distro to install a full Linux userspace.
3. Run the Sanctum installer, which sets up a Python venv, installs Letta, and configures the environment.
4. Your agent runs locally on your phone, talking to Venice AI (or any compatible backend) for inference.

Why Bother?

Privacy. If your agent runs on your device, your conversations never leave your phone (except for the inference API calls, which can be pointed at a local model if you're truly paranoid). It's also a powerful demo: pull out your phone, show someone an AI agent running entirely on-device, and watch their expression.

Performance is limited by the phone's hardware, so this isn't for production workloads. But for personal assistant tasks — managing your calendar, drafting messages, searching your notes — it's surprisingly capable.