Transparency

How Caliper was built

Caliper’s code was written with the help of AI. Much of the Swift source, the tests, the build scripts and this documentation was drafted with an AI coding assistant, then directed, reviewed and shaped by a person.

Testing the app itself was done by a human. The automated test suite checks the logic, but how the widgets actually look and behave — in the menu bar and on the desktop, with real sensors, in light and dark, on real hardware — was tried by hand on a real Mac. The measurements on What it costs were taken the same way.

That is said here so you can weigh it for yourself. The full source is on GitHub, and anything that looks wrong is welcome as an issue.

Provided as is

Caliper is free, open-source software, provided “as is”, without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and non-infringement. There is no promise that it works, keeps working, or suits any purpose.

In no event shall the authors or copyright holders be liable for any claim, damages or other liability — including loss of data, settings or productivity — whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or its use. You use it at your own risk.

These terms are those of the MIT License Caliper is released under; where this page and the licence differ, the licence applies. Sparkle, which Caliper includes for updates, is MIT-licensed too; both licences ship inside the app.