TethrX is an overall app developed by Nathan Ducatillon.
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App Information
TethrX is FREE to download. The download size is 4.41 MB. The latest version available is 1.0. The last update was on August 10, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since August 2026.
Description
TethrX is a native, private, independent remote for Grok Build, SpaceXAI's terminal coding agent. Your phone is only a control plane, Grok, its tools, and your code stay on your own machine. TethrX connects to a small open-source bridge you run on your computer.
• Watch Grok work in real time — thoughts, commands, file edits, and their output. • Approve or reject every tool call — from the app, or straight from a push notification on your lock screen. • Plan mode — Grok drafts a plan; you review and approve it before it builds. • Review what changed — per-file diffs, commit or discard from your phone. • Queue follow-ups, branch sessions, schedule recurring tasks, dictate messages. • No accounts, no tracking, no third-party servers. Your phone talks only to your bridge, direct, over Tailscale, with certificate-pinned HTTPS.
Requires your own Grok Build install (SuperGrok / SuperGrok Heavy / X Premium+) and the TethrX bridge running on your computer (npx tethrx-bridge). Setup takes a couple of minutes.
TethrX is an independent client and is not affiliated with, endorsed by, or sponsored by SpaceXAI. "Grok" and "Grok Build" are trademarks of their respective owner.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.