I have my indoor Airgradient One bookmarked and reporting in the iOS app, however when I toggle Threshold alert for the location, set a threshold, and back out, it doesn’t retain the setting. When I go back in, the toggle is off. I haven’t tried every metric but it’s not working for PM2.5 or CO2. Restarting my iPhone did not fix it. Perhaps this is a bug? Setting notifications for outdoor monitors appears to work.