A free program for Android, by ai.type.

ai.type French Dictionary is an essential tool for you to improve your typing skills and get a better grasp of the language. With this app, you can study the different conjugations and declensions of the French language and get a better understanding of the grammar. The dictionary has an integrated thesaurus that helps you find the right word. It also provides word suggestions and a correct spelling, as well as a search function. 

The app is very easy to use and has a simple interface. It has a large amount of words and can be a bit slow at times. However, the dictionary is fully compatible with the ai.type Keyboard. You can also use the dictionary to help improve your writing skills and get a better grasp of the language.