Statistical Results by Language App Efficacy
Based on Vocabulary/Grammar Proficiency by College Placement Test

Year
Language App
Improved Proficiency
Study Hours for
First College Semester
Sample
Size
Statistical
Report
Percent
 95% CI
Mean
Range
BEGINNER USERS
2023 LingQ 86 78-92 13 9-17 101 1
2019
88
82-93
13
10-17
143
2019 Mango Languages 82 72-88 15 12-20 87 1
2018
78
68-85
19
13-28
102
1, 2
2016
92
88-95
21
18-26
325
1, 2
2016
84
77-89
22
17-34
144
1, 2
2015
79
70-86
25
18-41
101
1, 2
2012
84
75-90
34
26-49
88
1, 2
INTERMEDIATE USERS
2021 Busuu 80 71-86 13 10-23 113 1

Explanatory Notes

The numbers in the table are rounded.
College Placement Test: Web Based Computer Adaptive Placement Exam (WebCAPE). Spanish WebCAPE Computer-Adaptive Placement Exam by Jerry Larson and Kim Smith, online version Charles Bush. ©1998, 2004 Humanities Technology and Research Support Center, Brigham Young University, link,
italki is a special service that connects users to teachers and tutors; it is not a stand alone language app.
Efficacy: Gain in college placement test (WebCAPE points) per one study hour.
Study Hours for One College Semester: Number of study hours in a two-month study period needed to cover the requirements for first college semester of Spanish.
95% CI: 95% confidence interval around the mean.
Range: Transformed 95% CI limits for efficacy; upper and lower limits divided by the threshold requirement for placement in second college semester of Spanish (270 WebCAPE points).