Privacy policy
Last updated: 14 November 2026
Posture404 is a desk-posture reminder for the Mac. This page says exactly what it does with your camera and your data.
The camera
Posture404 uses your Mac's camera to estimate how you are sitting. This happens live, on your Mac. Video and images are never recorded, saved, or sent anywhere. Each camera frame is analysed and then discarded.
The camera is on only during the guided setup and during a focus sprint. You can switch it off at any time from the round badge in the corner of your screen.
What the app keeps
The app keeps a small amount of information, only on your Mac and only inside the app:
- your setup (how you sit, where your screens are) as a few numbers, not pictures;
- a history of how many minutes you spent in good, slightly off and poor posture, your sprints, and which nudges you received;
- your settings, such as voice and sprint length.
Deleting the app removes this information.
What the app does not do
- It has no account or sign-in.
- It has no analytics, advertising or tracking, and no third-party code.
- It does not connect to the internet. The app is built without network access.
- It does not read the contents of your screen or your messages.
Other apps
To pause during video calls, Posture404 checks whether another app is using the microphone or camera. It does not hear or see anything from them. If you use Claude Code, you can add small local hooks that tell Posture404 when a run starts or ends; these send an empty signal on your Mac and no text.
Children
Posture404 collects no personal information from anyone, including children.
Changes
If this policy changes, the date above changes. Posture404 is a wellness reminder, not a medical device.
Contact
Questions about this policy: herominutes.com/contact