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Smartphone study reveals hidden screen time habits in teens

NCT ID NCT07293208

Knowledge-focused Sponsor: Phonix Health Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tracked the smartphone use of 171 adolescents and young adults to understand different screen time patterns, from low to excessive use. Participants installed an app that recorded their daily phone activity and filled out questionnaires about sleep, mood, and motivation. The goal was to see how screen use relates to health and well-being, and to identify who might be at risk for excessive use.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

171 people

The number who actually took part.

Started

Apr 2022

Finished

Mar 2023

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Participants were recruited from secondary schools and universities in Grenoble, France, through institutional communication channels and digital platforms. Recruitment occurred within educational settings located in various regions, allowing inclusion of adolescents and young adults enrolled in middle school, high school, or university programs.

Ages

12 to 25 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Own an Android smartphone * Have at least 200 MB of storage on your smartphone * Be in middle school, high school, or university * Be enrolled in a school within the Grenoble academy district Exclusion Criteria: * Own an iPhone * Participate in an interventional study in the field within the last six months * Not sign the consent form

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Conditions

The condition(s) this trial relates to.

Depression

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Screen time

Contacts and locations

Locations

  • Université Grenoble Alpes

    Saint-Martin-d'Hères, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.