Privacy policy
Last updated 15 November 2026.
Coach on Hand is a coaching app for the iPhone, Apple Watch, Android phones and Meta Ray-Ban Display glasses: you ask questions, practise a language, review flash cards and ask about your health data, and an AI answers. This page explains what the app sends, where, and what is kept. There are no accounts, no advertising and no tracking, and nothing is sold.
What stays on your device
Your chats, practice sessions, flash cards and the photos you attach are stored only on your phone, in the app's own storage. Deleting a chat deletes its photos too; deleting the app deletes everything. On the iPhone, chats, their photos and practice sessions are left out of your iCloud Backup unless you turn on Include chats in iCloud Backup in Settings; health summaries and the app's log are never backed up; flash cards are. On Android the app's data is not backed up. Your pairing token and any API keys you enter are kept in the phone's secure storage (the iPhone's Keychain, Android's Keystore) and are sent only to the service they belong to.
What is sent when you ask
Nothing is sent until you ask something. The app asks you to agree before the first question goes to any AI service. When you ask, it sends what is needed to answer:
- your question (typed, dictated, or said on the glasses) and the recent messages of that chat;
- photos you attach (up to three per question);
- your location, only when you turn on Share my location;
- summaries of your health data, only when you ask about your health or a workout (see below);
- what you say and write in Practise;
- for the chess and xiangqi coaches, the board position and moves.
Where it goes
The Coach on Hand server (app.coachonhand.com), when the app is paired with a token. The server passes your question to Claude, made by Anthropic, which writes the answer, and returns it to you. The server does not store your questions, answers, photos or health data and does not write them to its logs; its logs record only counts and timings (for example the number of tokens used, how many photos were attached, and whether a location was included). Usage counts for daily limits are kept in memory and cleared every day. If you share your location, the server also sends the coordinates to OpenStreetMap Nominatim to find the name of the place. Board positions go to chess and xiangqi engines running on the same server.
Your own AI service, if you enter your own API key: Anthropic, OpenAI, Google Gemini, or another service you choose. Then your questions go straight from your phone to that service, not through the Coach on Hand server, and the service's own terms and privacy policy decide what it keeps and whether it may use your data to improve its models. Check them, especially for free keys.
Anthropic's handling of data sent through the Coach on Hand server is covered by Anthropic's privacy policy and its commercial terms.
Health data
On the iPhone the app reads Apple Health data you allow (activity, workouts, sleep, heart and body measurements) and saves workouts you start on the Apple Watch to Apple Health. On Android it reads Health Connect and never writes to it. This data stays on your phone. It is sent only when you ask a question about it: then a summary of the relevant days goes with your question to the AI service you use, to answer that question. Health data is never used for advertising or marketing, never sold, never shared with anyone else, never stored by the Coach on Hand server. The health summaries themselves are never stored in iCloud; if you turn on chat backup, the questions and answers in your health conversations are included in it like any other chat. You can withdraw access at any time in the Health app (iPhone) or Health Connect (Android).
Speech, voices and the glasses
Speech is turned into text by your phone's speech recogniser: on the iPhone, on the device where it supports your language, otherwise by Apple's speech service; on Android, by Google's. Answers are read aloud with the phone's own voices. The glasses connect through Meta's Device Access Toolkit and the Meta AI app; Meta's analytics in the toolkit are turned off. The glasses web app keeps its pairing token in the glasses browser's storage.
Your choices
- Location and health access are off until you turn them on, and you can turn them off at any time.
- In Settings → Connection you can see where your questions go and withdraw your agreement.
- You can delete chats, practice sessions and flash cards in the app, or delete the app.
Children
Coach on Hand is not directed at children under 13.
Changes and contact
If this policy changes, the new version will be posted here with a new date. Questions or requests: seth@coachonhand.com.