english: So the Accessory Development Kit from Google is open-source and based on Arduino, as opposed to the one from Apple which is closed-source, NDA, sign your life to Apple. Here you are.
non_english: Taký Accessory Development Kit od Google je open-source založený na Arduino, na rozdiel od podobnej technológie od Apple, ktorá je patentovaná, pod záväzkom mlčanlivosti - upíšte svoj život Applu.