Support
Setting up partner sync, pairing your AI agent, or moving phones — the answers to the common cases are below, and a human engineer reads every email.
Frequently Asked Questions
What makes Tether different from other health apps?+
Tether is the only health app on the App Store designed to be read by your own AI agent. It speaks the Model Context Protocol (MCP), so it plugs directly into Claude Code, Hermes, OpenClaw, and any other MCP-capable agent — the same way those agents connect to files or databases, they connect to your health. Your Apple Health data — sleep, cycle, heart, activity — syncs end-to-end encrypted to the cloud, and a machine you own decrypts it locally and reasons over it. No AI runs in our cloud; we only ever store ciphertext. Your AI can read your health. We never can.
How do I connect my AI agent?+
On the computer where your agent runs (Claude Code, Hermes, OpenClaw — anything that speaks MCP), install the Tether local MCP server (setup guide in the community repository). It displays a QR code — scan it from Tether's Settings on your iPhone. From that moment your phone seals an extra encrypted copy of each record for that machine, and your agent can query your health history through standard MCP tools. You can unpair the machine at any time in Settings, which revokes its access.
My partner's data isn't showing up.+
Three things to check, in order: ① Both phones are signed in and the partner bond is active (Settings → Partner). ② The data category you expect is actually shared — sharing is per-category, and the toggle lives on the data owner'sphone, not yours. ③ Give it a moment after your partner's phone syncs: data flows iPhone → cloud → your iPhone, and iOS schedules background uploads on its own rhythm. Opening the app on your partner's phone forces a fresh sync. If it still fails, email us with both iOS versions.
I switched to a new iPhone — is my history gone?+
No, as long as iCloud Keychain is on. Your decryption key lives in your personal iCloud Keychain and follows you to the new device; sign in with the same Apple ID and your history decrypts in place. If iCloud Keychain was off when you set up Tether, the key existed only on the old phone — that's why the app warns about it at setup. Check Settings → [your name] → iCloud → Passwords and Keychain.
Last night's sleep looks wrong (too long, or missing stages).+
Sleep quality depends on the source. An Apple Watch records real sleep stages (core, deep, REM); an iPhone alone infers sleep from motion and produces a rougher, longer-looking record. Tether automatically prefers stage-detailed Watch data when both exist. If you don't wear a Watch, expect approximate sessions — and if a third-party sleep app also writes to Apple Health, its data can add noise. You can review every source in the Health app under Browse → Sleep → Data Sources.
How do I delete my account and data?+
In the app: Settings → Account → Delete Account. This removes your encrypted health blobs, envelopes, device records, and partner relationships from our servers. Data already on your own devices (or a machine you paired) stays yours — we can't reach into your hardware, by design. Details in the Privacy Policy.
Still stuck? Contact us
Email us with your iOS version and what you were doing (partner sync, AI pairing, new device, …). Never include health data in an email — we don't need it and can't use it.