วิธีดูประวัติเครื่องคิดเลขของ iPhone

Copy Last Result

1. Open the Control Center.You can do this by placing your finger in the upper-right corner of the screen and swiping down. Your iPhone allows you to copy the result of the last calculation you did in your calculator without having to open the app.

   • This data is not visible in the Calculator app itself.

2. Press and hold the calculator app.This app is at the bottom of the Control Center and has a black background with a white calculator icon. A contextual menu will pop up.

   • You can also press and hold on the calculator app on your home screen or in your App Library to pull up the contextual menu.

3. Tap Copy Last Result.This will copy the result of your last calculation, but it won't show you what the formula was. Nonetheless, it is a method of obtaining some history from your Calculator app.

   • Your last calculation will be stored even if you restart your phone.

Memory Function

1. Open the Calculator app.While the iPhone calculator can't remember specific equations, you can set it to remember a number just like a standard physical calculator.

2. Turn the phone to landscape orientation.If you have Portrait Orientation Lock on, turn it off by swiping down from the upper-right corner to open the Control Center and tapping the orientation lock button, which looks like a lock surrounded by an arrow.

3. Perform a calculation that has a result you want to save.

4. Press the m+ button.This will add the current number on your calculator to the memory. The mr button will highlight when the memory recall function is active.

5. Press the mr button to recall the saved number.The saved number will pop up in the number field and you can include it in future calculations.

6. Use the m+ and m- buttons to adjust the saved number.For example, if your saved number was 7 and you typed 14 into your calculator and pressed m+, your new saved number would be 21.

   • Using m+ and m- will change your saved number. If you want to just use the number in calculations, use the normal plus and minus buttons.

7. Press mc to clear your saved number.If you need to re-do your saved number or are finished, you can clear it out by pressing mc.

Third-party Apps

1. Calculator with History+.Calculator with History+ is a simple calculator app that looks very similar to the iPhone's built-in Calculator app. However, the biggest difference is Calculator with History+ allows you to see a history of the calculations you've done.

2. Calcbot 2.Calcbot 2 not only shows you the history of your calculations, but allows you to favorite them so you can find them again easily.

3. Numerical².Numerical² is a visually stunning calculator app that records your calculation history and also syncs that history with iCloud so you can refer back to it on multiple devices.