Mobile Client: Small images are always enlarged to screen width
On Nimbus smartphone apps, images are always scaled to page width, no matter how large they actually are. A 100 x 100 pixel image fills the page width on the smartphone screen just as much as a 1000 x 1000 pixel image. This results in an unattractive and undesirable display for images that are physically smaller than the width of the smartphone screen.
These smaller images should therefore be displayed in their original size. Only images whose size exceeds the screen width should be resized to fill the screen.
The screenshots show the display of a note with a 100 x 100 pixel image and text on the desktop client and the mobile client (behaves the same on Android and iOS).