What applications are there to progress in French with the iPad or iPhone?

Let’s leave culture to return to the numerical world.
If you cannot go to learn French in France or Montreal, you can always resort to less expensive and simpler methods.
For example, you can use Apple applications to study French.
Applications have the advantage of motivating, conquering and pleasing the public. Whether it is adults or young people, in addition. Learning the French language is mixed here with enjoyment: a great vector for rapid progress.
But what applications do we recommend, for iPad and iPhone, to improve in French? Here are some ideas:
Duolingo was chosen as the best learning application in 2013. We found numerous fun exercises to work on grammar, vocabulary, conjugation, and oral and written expression. The application is totally free.
Babbel is paid (€ 9.99 per month), it is more serious and scholarly than Duolingo. French lessons are available for two Apple terminals: mobile, tablet or computer. You can work on French grammar, conjugation, vocabulary and pronunciation.
There are multiple applications that will help you progress in your learning of the French language. What applications are there to progress in French with the iPad or iPhone?