Compass

Tech 09 Sep 2026 8 min read

Why Your Phone Compass Can Point the Wrong Way

A maps app can know where you are yet show your direction incorrectly. The location marker may be on the right street while its direction indicator points sideways, rotates while you stand still, or seems to face the wrong way. That is possible because location and direction are different measurements. A phone can estimate its position from satellite navigation, Wi-Fi, mobile networks, and other information, while its compass heading depends heavily on sensing the magnetic field around the device.

Smartphones Sensors

Tech 06 Sep 2026 8 min read

How Your Phone Compass Knows Which Way You Are Facing

A map can show your position correctly while the direction arrow points the wrong way. You turn the phone, but the arrow hesitates, swings around, or seems several degrees off. Then a compass app asks you to move the device through the air to improve its accuracy. These behaviours make more sense once you separate two questions: Where is the phone? and Which way is it facing? Location systems can help answer the first question, but a phone usually needs additional sensors to estimate the second when it is standing still.

Smartphones Sensors

Tech 04 Sep 2026 8 min read

Why Your Phone’s Compass Can Point the Wrong Way

A map app can know your location correctly while the direction arrow points sideways. A compass app can also appear accurate in one place and drift badly in another. These problems make more sense once you separate two questions that phones answer in different ways: Where am I? and Which way am I facing? Satellite navigation can help answer the first question. To estimate the second while you are standing still, a phone commonly relies on magnetic and motion sensors. Those sensors are useful, but the magnetic one can be disturbed by ordinary objects around you.

Smartphones Compass