Gendered is a very simple app intended to help with the learning of the gender of nouns in languages such as German, Spanish or French.
As per Wikipedia:
a grammatical gender system is a specific form of a noun class system, where nouns are assigned to gender categories that are often not related to the real-world qualities of the entities denoted by those nouns
Currently only German is supported.
The mechanics are as simple as possible. A noun is presented and the user has to choose the right gender for it:
Gendered is not available in the official app stores yet, and it might never get there because they require a fair amount of paperwork.
Alternative app stores such F-Droid and AltStore are being considered.
In the meantime, if you are in desperate need of a build you can try the development documentation.
The gender of nouns is crucial in certain languages in order to speak them correctly, so having a dedicated app to practice is very helpful.
Correct. But this author happens to enjoy Flutter as a development framework.