Should your font size change based on size and orientation of the device?

I am created a cross platform app and I was wondering if and when fonts should scale based on the size of the screen. Also, I was wondering if the scales of fonts should change based on the orientation of the device or on very large/very wide devices. For example, I have one screen which has the text as the main subject of the screen. This font looks a bit odd on different devices when it doesn't