Pediatric Weight Estimation With Augmented Reality Presented at 30° SMART Congress in Milan 8-10 May 2019 PediTape app is very simple and easy to use. After launching the app, the smartphone camera is immediately activated and displayed in full-screen with a yellow marker in the centre of the screen. The augmented reality software starts to track a correspondence between the real-world space and the virtual space: this is the essential requirement for any AR experience, and it’s called world tracking. World tracking also analyses and understands the contents of a real-world space using hit-testing methods detecting flat surfaces and main objects in the scene image. All these steps are needed in order to display the measuring tape together with a live camera image so that the user experiences augmented reality with the illusion that the virtual tape is part of the real world. After the completion of this process the app is ready to measure the length of the child by determining the two extremities points, head and foot. To start measuring child height you have to point the marker either to the head or to the foot of the child (starting point) and tap the marker by keeping the smartphone camera steady. After this action a virtual tape anchored to the starting point is displayed in the screen. From now, moving the smartphone around the child will increase the length of the coloured tape like a self-retracting metal tape measure. The next step is to tap while the marker is over the foot (or head if previously started from foot) defining the ending point.