It’s become increasingly popular to use an iPhone or smart phone as a compass. However, when you’re using it to be accurate, it’s best to use a magnetic compass to measure a magnetic field. That’s because electricity interferes with magnetic measurements.
If you are confused by feng shui, you’ll be happy to know that there is a secret weapon in the feng shui arsenal: the compass. Many feng shui experts recommend locating the wealth, career, health, etc., sectors of your home by orienting off the door to the room. This can often be confusing because there may be more than one entryway to a room.