The Aithre Shield 4.0 received an exciting endorsement from the skeptical pilots at Sporty's pilot shop with a feature article in the iPad Pilot News. John Zimmerman has been a long proponent of carbon monoxide detectors ever since he suffered from exposure during a flight. While he has used the brand that he credits to alerting him of the exposure, John has made the switch to the Aithre Shield 4.0 due in large part to the iOS app features. Specifically, the trend data and customizable Siri alerts most impressed. He correctly noted that the Shield will talk to you via your headset to relay carbon monoxide thresholds being crossed.
You can read the full feature article here: https://ipadpilotnews.com/2019/05/aithre-releases-new-carbon-monoxide-detector-and-app/.