Really Outstanding French Dictionary
The content is from Éditions Larousse, the venerable French dictionary and reference work publishing house, and is excellent and comprehensive.
High quality sound files are available (internet connection required), not just for headwords, but for all of the copious number of example phrases and sentences. Every verb is fully conjugated in all moods and tenses. The display font size is easily adjusted. It is difficult to think of any improvements in this app.
One small point. Larousse’s French- English Unabridged dictionary is more comprehensive and contains obscure and unusual words that can otherwise only be found in French-only dictionaries such as ‘Le Petit Robert’ etc. The Unabridged dictionary has all the other features, but lacks verb conjugations. I strongly recommend it as well, particularly for more advanced learners.