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Can a phone app beat the gold standard for weight loss?

NCT ID NCT04708769

Disease control Sponsor: Northwestern University 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 This study
Running, but no longer taking on new participants.
Completed
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests a smartphone-based weight loss program (EVO) against the standard Diabetes Prevention Program (DPP) in 524 adults with obesity. Participants use an app to track diet, activity, and weight, with remote coaching. The goal is to see which approach leads to more weight loss and is more cost-effective.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
behavioral weight loss intervention via smartphone app
What this could lead to
If successful, this could offer a more accessible and cost-effective way to manage obesity without in-person visits.
What could go wrong
This is a behavioral intervention, not a drug, so results depend on participant adherence. The study is not yet complete, and the app may not work for everyone.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 524 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2021

Expected to finish

Jul 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Ages

18 to 70 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: * BMI 30-45 * Weight stable * Own a Smartphone and be willing to install our Smartphone app * Willing to conduct video conference calls with study staff Exclusion Criteria: * Enrolled in any formal weight loss program * Taking anti-obesity medications * Not taking medications that may cause weight gain * Unstable medical conditions * Diabetes requiring insulin supplementation * Crohn's Disease * Diagnosis of obstructive sleep apnea requiring intervention (i.e., CPAP) * Assistive devices for mobility * Hospitalizations for a psychiatric disorder within the past 5 years * Cardiovascular disease symptoms while performing moderate intensity exercise * Pregnancy, trying to get pregnant, or lactating. * Bulimia or binge eating disorder * Reports of active suicidal ideation * Current substance abuse or dependence besides nicotine dependence

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Conditions

The condition(s) this trial relates to.

Motor Activity Obesity obesity disorder Weight Loss

As listed by the trial registrant

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

Obesity

Contacts and locations

Locations

  • Northwestern University

    Chicago, Illinois, 60611, United States

More trials for these conditions

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