Compare Language Apps

Statistical Research on Efficacy of Language Apps
20+ Years of Research

Evidence-Based
Language Learning
Research

Discover which language learning apps actually work through rigorous statistical analysis by Dr. Roumen Vesselinov and his team.

16+
Language Apps Tested
2005
Since
Rigorous statistical methodology
Vocabulary/Grammar proficiency efficacy testing
Oral proficiency efficacy testing
Language learning motivation testing
Independent research
Featured Study

Busuu Six-Language Efficacy Study

Our most comprehensive study yet, analyzing Busuu's effectiveness across six different languages with rigorous statistical methodology.

Study Highlights 2025
Languages
6
Study Duration
12 weeks
Efficacy Rating
Done
Language Learning Apps Research Overview

Comprehensive statistical analysis of language learning app efficacy

# Language Learning Apps Research Overview Year Report Vocabulary/
Grammar
Proficiency		 Oral
Proficiency		 Motivation Language
Aptitude
1
Busuu 2025 Six-Language Efficacy Study Featured
2025 TESTED TESTED TESTED —
2
LingQ 2023
2023 TESTED TESTED TESTED —
3
Busuu 2021
2021 TESTED TESTED TESTED TESTED
4
TrueNorth Test (TNT)
2020 — TESTED — —
5
Mango Languages
2019 TESTED TESTED TESTED —
6
Pimsleur
2019 — TESTED TESTED —
7
Rosetta Stone
2019 TESTED — TESTED —
8
italki
2018 TESTED TESTED — —
9
Hello English
2017 — TESTED — —
10
Babbel
2016 TESTED — — —
11
Busuu
2016 TESTED TESTED — —
12
Language Zen
2015 TESTED — — —
13
Duolingo
2012 TESTED — — —
14
Rosetta Stone
2009 — — TESTED —
15
Rosetta Stone, Auralog, Tell Me More, Berlitz
2009 — — TESTED —
16
Rosetta Stone
2009 TESTED TESTED — —
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Research Studies
1. "Busuu 2025 Six-Language Efficacy Study".

Vesselinov, R., Grego, J., Tasseva-Kurktchieva, M.

2025 Report
2. "LingQ Efficacy Study 2023".

Vesselinov, R., Grego, J., Tasseva-Kurktchieva, M.

2023 Report
3. "The Busuu Efficacy Study 2021".

Vesselinov, R., Grego, J., Tasseva-Kurktchieva, M., Sedaghatgoftar, N.

2021 Report, Executive Summary
4. "Predictive and Psychometric Properties of the TrueNorth Test (TNT)", 2020.

Habing, B., Grego, J., Vesselinov, R.

2020 Report
5. "Mango Languages Efficacy Study", 2019.

Vesselinov, R., Grego, J.

2019 Report
6. "Pimsleur Efficacy Study", 2019.

Vesselinov, R., Grego, J.

2019 Report
7. "The 2019 Rosetta Stone Efficacy Study”, 2019.

Vesselinov, R., Grego, J., Sacco, S., Tasseva-Kurktchieva, M.

2019 Report
8. "italki Efficacy Study”, 2018.

Vesselinov, R., Grego, J.

2018 Report
9. "Hello English Efficacy Study”, 2017.

Vesselinov, R., Grego, J.

2017 Report
10. "The Babbel Efficacy Study”, 2016.

Vesselinov, R., Grego, J.

2016 Report
11. "The Busuu Efficacy Study”, 2016.

Vesselinov, R., Grego, J.

2016 Report
12. "Language Zen Efficacy Study”, 2015.

Vesselinov, R., Grego, J.

2015 Report
13. “Duolingo Effectiveness Study”, 2012.

Vesselinov, R., Grego, J.

2012 Report
14. "Measuring the Attitude and Motivation of Rosetta Stone Users", 2009.

Vesselinov, R., Grego, J., Habing, B., Lutz, A.

2009 Report
15. "Comparative Analysis of Motivation of Different Language Learning Software”,
(Rosetta Stone, Auralog, Berlitz), 2009.

Vesselinov, R., Grego, J., Habing, B., Lutz, A.

2009 Report
16. "Measuring the Effectiveness of Rosetta Stone", 2009.

Vesselinov, R.

2009 Report
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Researcher
ROUMEN VESSELINOV, Ph.D.
study@comparelanguageapps.com