Unless the App does something obvious, such as causing over-voltage or over-heating, the Nano cannot be damaged by it. I suspect your boards may have arrived with a manufacturing fault, or were perhaps damaged during packaging or during transport.
Unless the App does something obvious, such as causing over-voltage or over-heating, the Nano cannot be damaged by it. I suspect your boards may have arrived with a manufacturing fault, or were perhaps damaged during packaging or during transport.