Privacy

Short version: the tools on this site run in your browser and store nothing. Numbers you type never leave your device.

The free tools

The Longevity snapshot, dead-hang test, NEAT calculator and experiment planner run entirely in your browser. They don't send what you enter anywhere, and they don't save it, not even in your browser's local storage. Close the tab and it's gone.

Analytics

This site uses Ahrefs Web Analytics to count visits and see which pages are useful. It reports aggregate numbers such as page views and referring sites. It is not used to identify you.

Links to the apps

Links to the app websites and the App Store include campaign tags (for example utm_campaign=hang-test) so I can see which pages are helpful. They contain no personal information.

The apps

Each app has its own privacy policy on its website. All of them run on your iPhone without an account and share data only through Apple Health, with your permission.