One of my favourites

I use this app to make illustrations for biology labs. Some of my favourite features are the ability to use any image in the app and the ability to save things I create in the shapes library.
I would give 5 stars if it was possible to draw arrows that do not attach two objects as these are particularly useful in science. Also rotating objects is hard.

TheTott about Grafio 4 - Diagram Maker, v2.9