While each patient has to use their own spirometer, the same app installed on a single phone or tablet can serve multiple patients. Upon launching the app, the parent / patient would need to click the CONNECT button and choose the correct device ID. It might help to prevent errors by removing the batteries of the device not currently in use while the other patient tests with his/her device (but it's not mandatory). If you're paired with one device and would like to switch to another spirometer, select CONNECT, then 'Connect your ZEPHYRx' in the lower right hand corner to show other available devices (see below).
The app will show you previous results for the patient whose spirometer is currently connected. If you disconnect and reconnect to a different spirometer those results will show for that other patient.
On the dashboard, we show results based on the spirometer ID, so both patients will show up distinctly.