The Isonas app will work at different read ranges from the door.
If you are finding that you have to be really close to the door reader for your app to work, try changing the read range in the app.
To change the read range, select the three dots in the upper right-hand corner of the app.
Select "Set Read Range"
If your Current Setting is not already set to long, select "LONG".
Please submit any further questions to itsupport.