Duolingo FR from AR versions:

2015-10-16, ? skills (= ? different lessons)
2016-12-02, 45 skills (= 45 different lessons)
2021-10-16, 78 skills (= 78 different lessons)
2022-11-10, 50 units (78 different lessons)
2023-09-11, 51 units (78 different lessons)
2024-05-10, 89 units (78 different lessons)
2024-08-18, 78 units (78 different lessons), CEFR A1
2024-11-01, 69 units (69 different lessons), CEFR A1

Edited by Mat!/Ozone, 2025 03 18.