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Smartwatch app aims to tame Kids' meltdowns in real time

NCT ID NCT07312695

Symptom relief Sponsor: Holland Bloorview Kids Rehabilitation 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study tested a smartwatch app called holly™ that tracks children's emotional arousal levels and sends alerts to parents. Over three weeks, 126 children with strong emotional responses wore the watch while parents used a study phone to see updates and history. The goal was to see if families found the tool useful and easy to use at home, school, and in the community, and to gather early data on whether it improves quality of life.

What this could mean

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

Active substance
holly™ smartwatch app (device)
What this could lead to
If it works, this could give families a practical tool to help children manage strong emotions in real time, potentially improving daily life and emotional wellbeing.
What could go wrong
This is a small, early-stage community trial focused on usability, not on proving health outcomes. The app is informational only and not meant to diagnose or treat any condition.

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

126 people

The number who actually took part.

Started

Apr 2023

Finished

Jul 2024

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

4 to 21 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: * Strong emotional responses, such as outbursts, shutdowns, and/or meltdowns as reported by parents Exclusion Criteria: * Use of beta blockers

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Conditions

The condition(s) this trial relates to.

anxiety disorder Emotional Regulation

As listed by the trial registrant

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

Behavioural responses and emotional reactivity

Contacts and locations

Locations

  • Holland Bloorview Kids Rehabilitation Hospital

    Toronto, Ontario, M4G1R8, Canada