OPCV Privacy Policy

Last updated 3 October 2026

Who this covers

OPCV is a private tool run by John Kavanagh for his own health data. It has one user: John Kavanagh. It is not offered to anyone else.

What OPCV reads from Google

With the user's consent, OPCV reads the following from the Google Health API, read-only:

• Health metrics and measurements: weight, body fat, height, heart rate, heart-rate variability and oxygen saturation.
• Activity and fitness: steps, distance and active minutes.
• Sleep: sleep sessions and stages.

OPCV never writes to, changes or deletes anything in Google.

How the data is used

The data is copied to a private server in the user's home, where it is shown as charts and used to send the user reminders. It is used only to provide these features to the user himself.

Sharing

The data is not sold, not shared with or transferred to anyone, not used for advertising, and not used to train any machine-learning or AI model. No person other than the user reads it.

Google API Services User Data Policy

OPCV's use and transfer of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.

Storage and security

The data and the access token are stored on the user's own server, reachable only over his private network. Access tokens are kept as protected secrets and are never written to logs.

Keeping and deleting data

Data is kept until the user deletes it. Access can be withdrawn at any time at myaccount.google.com/permissions, after which OPCV can read nothing further.

Contact

John Kavanagh, ethnicore@gmail.com