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How to Save and Read Data from Shared Preferences in Flutter is a simple use case of shared preferences. We will develop a simple app in which you can increase or decrease the number shown in the text filed with the help of these two buttons. The integer value in the. text field is coming from the saved preferences. When you click on the plus button, I am just increasing the current integer value by 1 and saving the new value. You will find the same value in. the text field because of shared preferences. You can terminate the app and restart it again.