# PHQ-9 Questionnaire > Patient Health Depression 9-item Questionnaire (PHQ-9) Canonical page: [https://chrome-stats.com/d/com.mobiletechnologylab.depression\_questionnaire](https://chrome-stats.com/d/com.mobiletechnologylab.depression_questionnaire) ## Overview - **ID:** `com.mobiletechnologylab.depression_questionnaire` - **Platform:** Android - **Type:** Android app - **Status:** Removed - **Publisher:** Mobile Technology Lab - **Category:** HEALTH\_AND\_FITNESS - **Downloads:** 186 - **Version:** 4.0.2 - **Last updated:** 2019-06-30 - **First published:** 2019-03-19 - **Data as of:** 2025-04-13 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.mobiletechnologylab.depression_questionnaire) - **Privacy policy:** [https://docs.google.com/document/d/1fzgQrxJk\_FmZ8JPvLvpxC7om4-vcZJMDK7HFeIyNLZQ/edit](https://docs.google.com/document/d/1fzgQrxJk_FmZ8JPvLvpxC7om4-vcZJMDK7HFeIyNLZQ/edit) ## Description In the field of mobile health and psychology, one of the most common questionnaires that is used to screen for the presence of depression is the PHQ-9 questionnaire. This questionnaire does not DIAGNOSE depression. It is simply used to help determine the likelihood of having mild or severe depression for the purpose of seeking professional care from a mental health provider.
There are many published academic papers regarding this questionnaire. The classic reference is listed here:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1495268/

This mobile app provides a sample implementation of the classic PHQ-9 questionnaire. This app can be used by itself, or it can be used as part of a suite of apps that is used to do health screening or diagnostic support.

By itself, this mobile app does not collect or share any data with a server. But this app can be used together with ANOTHER mobile app that is designed to collect data and store it in a secure database as part of a clinical study.
As an example, the PHQ-9 questionnaire can be used together with the Diabetes Screener mobile app that provides database support and send data to a remote server. You can view the Diabetes Screener mobile app in this link:
https://play.google.com/store/apps/details?id=com.mobiletechnologylab.diabetes_screener&hl=en_US&gl=US

An example of how these apps can be used together is demonstrated in the following YouTube video (for the case of Pulmonary Screener):

https://www.youtube.com/watch?v=k4p5Uaq32FU

If you wish to use this mobile app as part of a clinical study using smart phone data collection, please contact our lab for more information.

Thank you.

Contact:
-- Rich Fletcher (fletcher@media.mit.edu)
MIT Mobile Technology Lab
Mechanical Engineering Dept. ## Similar extensions and apps - [PHQ-9 Depression module](https://chrome-stats.com/d/com.mobilesafeapps.phq9) — 3,091 users - [Depression Test](https://chrome-stats.com/d/testt.depressiontest) - [Depression Test PHQ-9](https://chrome-stats.com/d/com.nax.depressiontest) — 6,672 users - [Depression Test](https://chrome-stats.com/d/com.moodtools.depressiontest) — 647,372 users, 4.29 / 5 - [Быстрый тест на депрессию](https://chrome-stats.com/d/test.depression_test_app) - [PHQ9 GAD7 WSAS](https://chrome-stats.com/d/com.aapps.solutions.ph9_gad7_wasa) — 438 users - [Depression Test Tracker: PHQ-9](https://chrome-stats.com/d/pl.mffn.depressiontest) — 175 users - [Shoulders](https://chrome-stats.com/d/com.melancholia) — 14 users - [PSQI Questionnaire](https://chrome-stats.com/d/com.mobiletechnologylab.sleep_questionnaire) — 192 users - [Pocket Depression Test](https://chrome-stats.com/d/com.imedicalapps.pocketdepressiontest) — 12,103 users - [GAD7 Questionnaire](https://chrome-stats.com/d/com.mobiletechnologylab.anxiety_questionnaire) — 356 users - [Mood Tracker PHQ-9 & GAD7](https://chrome-stats.com/d/com.highland_software.moodandanxietytracker) — 12 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.mobiletechnologylab.depression_questionnaire)