Ok, super super simple explanation to get what you want. Open the door slooooooowly. Like a 1/4 inch at a time, give it 30 seconds, check the app. You'll find a point where it goes from closed to open. Close it again a tiny bit, confirm that it goes to closed. Open it back to where you had it, confirm it goes to open. Take a ruler, measure the distance between the sensor and the magnet. Now close the door fully, take off the sensor or magnet. Take your ruler and now put back the sensor or magnet to the distance that you just worked out. If you did it right, now it'll activate right away when opening and won't show closed if it's open an inch.