One product on the web, iPhone and Android — where the design cannot quietly drift apart

The usual way to build a product for web, iPhone and Android is three teams, three codebases and, eighteen months later, three products that no longer look like each other.

At Scale is one codebase that compiles to all three. A change ships everywhere on the same day, and a screen looks identical on every device because the illustrations are vector, not exported images.

The part we are proudest of is the check: every build is automatically compared against the original design, pixel by pixel. If someone nudges a padding value and the screen no longer matches what was signed off, the build tells them. The design cannot drift, because drifting fails the test.

It includes live video calling in the app, and it is deployed globally so it loads fast wherever the user is.