The app had to work in a factory that runs 24/7. Once a batch of glass is fractured, the test window is three to five minutes before secondary cracks form. There was no room for tutorials, onboarding flows, or extra taps. Siru launches directly into camera mode with real-time AR markers guiding the user to position the phone correctly — every time, without instruction. We visited the Glaston-Rakla factory to observe the process and interview the workers who would actually use the app. Their pain points were clear: counting tiny fragments by hand is tedious and subjective, manual notation on stickers wastes time, and the data disappears into folders nobody reads. The design addressed each of these directly. Glass thickness, order number, and notes are entered in the app. Results sync to Glaston Cloud within seconds. When factory connectivity fails, the phone's GPU handles processing locally. For Phase 2, Glaston and we reconvened to support the American standard — a different method that requires weighing the largest fragments rather than counting them. This meant redesigning the core user flow from scratch. We brought a more immersive interface, dark mode, and a refined experience that built on everything we'd learned from the first version.