Why is it almost impossible to buy even Apple Watch Sport in European, American and others Apple Store?

As it turned out, the key component of Apple Watch – Taptic Engine – is manufactured not by one manufacturer, but by two independent suppliers. Apple often works using this plan, but in this case the problem is of another kind: accessories from one manufacturer were identified as defective. As a result, the company had to move manufacture of Taptic Engine from China to Japan, and this requires much time.

Why is Apple Watch in deficit

Taptic Engine is a drive of linear moving in Apple Watch which provides a well-known tactile response. Each time when you press the display (or when you receive notification), it touches your wrist. This innovative way of notification allows to send heart rate to your near and dear, and involves more sense receptors.