Yes, you can upload pdf documents on your web login, they need to be under 6MB in size if attached to a post.
You can also go to your main web settings and upload pdf documents in the documents settings section of your Kinderloop, this is handy for policies or forms you want to make available to families.
Families can access any documents shared with them in their app...
Images posted on Kinderloop are seen at different resolutions, so online, menus etc are quite readable and the scale goes down depending on the device you are looking at them on.