How could I optimize those 3-party Apps from Google Play Store to improve the user experience in my device?

Please long press the App icon you want to optimize on the App Page, and then click the “Optimize” option. You could easily adjust the font size, contrast and others to achieve a better viewing experience on your Boox by clicking the “Adjust DPI", “Contrast and Font” , and other buttons. What is more, you could easily adjust the refresh rate as you liked by setting the "Animation Filter", "A2 mode" and "Regal" on your Boox.