The processor used was an Ambiq Apollo3. The 22nm Apollo4 is out and uses around 5uA/Mhz. Ambiq is also working on a 12nm Apollo5 with an interest in developing

The processor used was an Ambiq Apollo3. The 22nm Apollo4 is out and uses around 5uA/Mhz. Ambiq is also working on a 12nm Apollo5 with an interest in developing a linux SoC: https://ambiq.com/wp-content/uploads/2023/02/A-Vision-for-Ambient-Computing-White-Paper.pdf https://ambiq.com/wp-content/uploads/2023/02/A-Vision-for-Am... p.10 "Explorations of Linux/Android-grade processors in an "Apollo-like" power footprint"