How to Improve Compass Accuracy for iOS Devices
An accurate compass reading is essential for the correct orientation of your floor plan. Your smartphone’s built-in compass, also known as a magnetometer, can sometimes be affected by magnetic interference or outdated calibration. By following these steps, you can ensure your compass is providing the most precise reading possible.
To get the best compass performance on your iPhone, you’ll need to adjust a few settings related to your location services.
1. Enable Location Services for the Compass App
First and foremost, ensure that the Compass app has permission to use your location.
- Go to Settings > Privacy & Security > Location Services.
- Make sure that Location Services is turned on.
- Scroll down and tap on Compass.
- Select While Using the App.
2. Enable Compass Calibration
This is a critical system setting that allows your iPhone to use location data to automatically calibrate the compass.
- Go to Settings > Privacy & Security > Location Services.
- Scroll to the very bottom and tap on System Services.
- Find Compass Calibration and make sure the toggle is green (on).
3. Enable Precise Location
For the highest accuracy, ensure that Precise Location is enabled for apps that rely on the compass.
- Go to Settings > Privacy & Security > Location Services.
- Select the app you are using (e.g., your Feng Shui platform’s app or the native Compass app).
- Ensure that the Precise Location toggle is turned on.
4. Manual Calibration
If your compass still seems inaccurate, you can perform a manual calibration.
- Open the Compass app.
- If a calibration screen appears, follow the on-screen instructions, which usually involve tilting your phone to roll the red ball around the circle.
- If the calibration screen doesn’t appear, you can prompt it to recalibrate by moving your phone in a figure-8 motion a few times.
5. Check “Use True North” Setting
For Feng Shui purposes, you’ll want to use Magnetic North rather than True North.
- Go to Settings > Compass.
- Make sure Use True North is turned off. This will ensure the compass is pointing to the magnetic north, which is what is traditionally used in Feng Shui.
Frequently Asked Questions
The Compass app prompts you to roll a red ball around a circle to calibrate. If the calibration screen does not appear, prompt it by moving your phone in a figure-8 motion a few times. This restores the magnetometer’s accuracy for a reliable North reading.
The magnetometer can be affected by magnetic interference or outdated calibration. Nearby metal, magnets, phone cases with magnets, and electronics distort the reading. Recalibrate in an open area away from such sources, and remove any magnetic case or accessory before taking a reading.
Yes. Go to Settings and ensure the Compass app has permission to use your location. Without location access, the compass cannot deliver a stable, accurate reading. This is the first step before calibration.
For Feng Shui, use Magnetic North, not True North. Go to Settings > Compass and make sure Use True North is turned off. This ensures the compass points to magnetic north, which is what classical Feng Shui traditionally uses to determine a home’s facing and mounting directions.
Stand in an open space away from metal and electronics, hold the phone level and still, and take multiple readings from the same spot, shifting slightly each time. Keep “Use True North” off and recalibrate with a figure-8 if the needle drifts. Pair the result with a scale floor plan for the best orientation.