Of course private tutoring is one of the most effective ways. But you can't have a private tutored lesson while in a queue at the supermarket. Or on a train.

Of course private tutoring is one of the most effective ways. But you can't have a private tutored lesson while in a queue at the supermarket. Or on a train. Or while you wait for the water to boil. Of course the government pay for your services. They need people to be trained to be good at languages. Most of the people who use these apps are doing it as a hobby.