Huawei
Enable Complex Calculator Functions auf Huawei
The pre-installed Calculator app on Huawei phones looks like a basic tool at first glance, showing only the four standard operations plus percentage and square root. Scientific functions such as sine, logarithm, or factorial are hidden behind a screen orientation trigger instead of a menu toggle.
To reveal them, open the app and rotate your phone into landscape orientation: Tap on Calculator ➔ Tilt your device horizontally to show complex functions. EMUI detects the rotation and swaps the layout for an extended keypad with trigonometric, logarithmic, and memory functions.
This behavior lives inside the built-in app and works independent of the specific Android or EMUI version installed. If auto-rotate is locked in your quick settings, the calculator stays in portrait mode and the extended functions never appear, so check that setting first if tilting does not trigger the switch.
Installing a third-party calculator app is rarely necessary once this trigger is known, and skipping the extra app keeps your phone free of additional permissions and background processes.