Babbel Language Learning App Review

dont have enough time to discuss price, i only accept default bid.
need 1500+ words for one article,
i will submit it to my official website,
need high quality unique helpful contents for reader, provide value to user.

9th topic
Babbel language learning app review

outline like below

1.Introduction
2.How Babbel Works
3.Key Features
4.Strengths of Babbel
5.Limitations
6.Babbel Plus vs. Free Version
7.Tips for Maximizing Babbel
8.Comparison with Other Apps
9.Conclusion