Statistical Results by Language App Oral Proficiency

Year Language App At least
One Level Up

Two Levels or more Up Sample Size Statistical Report
Percent 95% CI Percent
BEGINNER/NOVICE USERS
ACTFL OPIc Level Improvement
2019 Mango Languages 74 60-84 39 46 1
2019 Pimsleur 83* 63-94 21 24 1
2019
Pimsleur
73
61-82 10 63 1
2018 italki 72 61-80 22 81 1, 2
2017 Hello English 73 60-83 16 55 1
2016 Busuu 75 63-85 31 61 1, 2
2009 Rosetta Stone
64**
56-72 19 135 1, 2
TrueNorth (TNT) Incremental Improvement
2019 Mango Languages 85 71-93 N/A 46 1
   INTERMEDIATE USERS
2021 Busuu 71 62-78 N/A 109 1
* Subsample from users following the Pimsleur Method and completing 30 lessons.
** Not directly comparable because the study time was self-reported.

Explanatory Notes

The numbers in the table are rounded.
ACTFL OPIc Level Improvement is at least one step up: e.g. from Novice Low to Novice Mid.
Oral Proficiency Interview by Computer (OPIc) is created by Language Testing International (LTI).
LTI is the exclusive licensee of the American Council on the Teaching of Foreign Languages (ACTFL) link .
italki is a special service that connects users to teachers and tutors; it is not a stand-alone language app.
95% CI: 95% confidence interval with Agresti-Coull correction.
At Least One Level Up: increased OPIc oral proficiency by at least one level (level definition link).
Mango Languages evaluation is based on TrueNorth Test TNT-ACTFL estimation.
TrueNorth Test (TNT) link.