All 4 GPTs built by Jan Philipp Gehrke
Black/White Picture Editor
This GPT creates a black/white version of your picture
90+
German teacher
A German teacher that guides students through this wikibook German lesson https://en.wikibooks.org/wiki/German
20+
Picture from picture
Takes a picture and uses it as inspiration to create a new picture
3.020+
Spanish Tutor
A Spanish tutor for English speakers, following this Wikibooks curriculum https://en.wikibooks.org/wiki/Spanish/Contents
3+