Tether Studio
Tether Studio is a robot policy desktop app in private beta. It brings demonstration recording, dataset checks, training configuration, and evaluation into one workspace. Use your own compute locally, on an SSH GPU box, or in your own Modal account. Recording and policy workflows have been checked in simulation; real robots remain unverified.
Private beta, alpha quality, free during the beta
Notice, 19 October: the builds below were published before our privacy fixes. If you have ever opted in to Tether's data-contribution program, set TETHER_NO_CONTRIB_UPLOAD=1 before you run them, or wait for the next build, which blocks episode uploads and turns off usage reporting by default. They also keep a paired computer connected to studio.fastcrest.com until you quit; do not pair if you do not want that.
Download
Download for macOS Apple silicon
Unzip, drag Tether Studio to Applications, then open it. This build does not update itself.
SHA-256b86dc1af26b9f408bddccbaa071d1136ec6f3cd9a02a6180a93cec4ae2846a3b
Download for Linux x86_64
Make it executable with chmod +x Tether-Studio-0.1.0-x86_64-cpu.AppImage, then run it. Tested only in clean cloud containers; no real Linux desktop has been verified, and the AppImage itself has not been run as an AppImage (only an extracted copy was smoke-tested).
SHA-256675021db07a584a0382b599965c8aeae7e1483de97ad9a1f01769c726bed277a
Command-line install
Run this in your terminal, then follow the printed instructions.
curl -fsSL https://downloads.fastcrest.com/install.sh | shSafety rules
- Keep a hand on the robot's physical power switch or physical e-stop when running a policy.
- Start at low speed with a clear workspace.
- Never leave a running policy unattended.
- The software e-stop is a second line of defence. Keep the physical stop within reach.
What is and is not verified
| Area | Evidence and limits |
|---|---|
| LeRobot arms | Tested in simulation only. Recording, policies, the safety layer, and local and SSH training are verified in simulation. |
| macOS | Verified on one Apple silicon Mac. A clean install on a second Mac has not been verified. |
| Linux | Tested only in clean cloud containers: headless smoke checks, a 300-frame simulated run and installer hashes. The full Linux test run was not completed; a disk guard stopped it. No real desktop, GPU or robot was tested. |
| Real robots | Nothing has been verified on real robots. |
| Larger models | Real GPU training of pi0, pi0.5, GR00T and X-VLA through Studio has not yet been run. |
Costs
Studio is free during the beta. You pay only for your own compute. You can use local compute or your own SSH GPU box without buying cloud credits.
Modal runs bill your own Modal account, with costs that depend on the selected hardware, model, and run duration. Set the spend cap before you start.
Feedback
Report a bug on GitHub. Include what you did, what you expected, what happened, your robot and machine, and the support bundle from the app's Doctor screen.
Issues are public. Review the support bundle and remove private information before attaching it. For anything private, or if you would rather not use GitHub, email team@fastcrest.com.