On an iPhone, the built-in Calculator app does not natively provide a comprehensive history of your calculations. However, you can employ the following workarounds to retrieve certain aspects of your calculator usage:

  1. Copy Last Result:

    • Long-press the Calculator app icon in the Control Center, Home Screen, or App Library to reveal a contextual menu.
    • Tap "Copy Last Result" to copy the result of your last calculation to the clipboard.
    • This method does not show the formula used but allows you to access the most recent result.

  2. Memory Functions:

    • Turn your iPhone to landscape orientation to access the memory functions.
    • Use the m+ button to store a number in the calculator's memory.
    • Use the mr button to recall the saved number from memory.
    • Use the mc button to clear the saved number and reset it to zero.

  3. Screen Recording:

    • Enable Screen Recording in your iPhone's Control Center settings.
    • Swipe down from the top right corner of the screen to access the Control Center while using the Calculator app.
    • Tap the Screen Recording icon to start recording your Calculator usage.
    • This method records your entire Calculator session, including inputs and results, but it takes up storage space.

For a more comprehensive history of your calculations, consider using third-party calculator apps from the App Store, such as:

  • Calculator with History+
  • Calcbot 2
  • Numerical²

These apps offer features like a history log of calculations and the ability to favorite or sync calculations across devices.