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Phone app aims to stop diet cheats before they happen

NCT ID NCT04784585

Symptom relief Sponsor: The Miriam Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 app that monitors when you might be about to break your diet and sends helpful alerts or tips. About 200 adults with obesity and heart risk factors will use the app alongside a standard online weight loss program. The goal is to see which types of alerts work best to prevent dietary lapses.

What this could mean

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

Active substance
smartphone-based just-in-time adaptive intervention (JITAI) with behavioral education and self-efficacy training
What this could lead to
If it works, this could lead to a scalable smartphone tool that helps people stay on track with their diet during weight loss programs, improving long-term weight control.
What could go wrong
This is an early-stage optimization trial, not a test of weight loss itself. The interventions may not prevent lapses in real-world settings, and results may not apply to 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

204 people

The number who actually took part.

Started

Oct 2021

Expected to finish

May 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

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Age 18-70 * Body mass index (BMI) between 25 and 50 kg/m-squared * Diagnosis of one or more cardiovascular disease risk factors (prediabetes, type 2 diabetes, hypercholesterolemia, or hypertension) * Able to walk 2 city blocks without stopping Exclusion Criteria: * Currently participating in another weight loss program * Currently taking weight loss medication * Lost \> 5% of their body weight in the 6 months prior to enrolling * Has been pregnant within the 6 months prior to enrolling * Plans to become pregnant within 6 months of enrolling * Has chest pain during periods of activity or rest, or loss of consciousness in the 12 months prior to enrolling * Has any medical condition that would affect the safety of participating in unsupervised physical activity * Has history of bariatric surgery * Has any condition that would result in inability to follow the study protocol, including terminal illness, substance abuse, eating disorder (not including Binge Eating Disorder) and untreated major psychiatric illness.

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder

As listed by the trial registrant

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

Obesity

Contacts and locations

Locations

  • Weight Control and Diabetes Research Center

    Providence, Rhode Island, 02903, United States

More trials for these conditions

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