AppetiteCheck Mobile

Your appetite study companion

AppetiteCheck guides you through a short check-in before and after each stimulation. It records heart rate from a compatible wearable and keeps each session ready for the research team.

Before and after check-ins Continuous session recording Timestamped research data

Get Started

Welcome Back!

Ready to log today's session. Let's get started.

One stimulation session

Follow these steps in order

1
Connect your wearable
Wait until a live heart-rate value appears.
2
Complete the before check-in
Answer the first questions and save the baseline reading before stimulation begins.
3
Complete the stimulation
You may lock the screen or use another app when mobile background recording is active.
4
Complete the after check-in
Save the response reading, finish the questions and submit the session.

AppetiteCheck will not submit a session until both heart-rate captures are saved.

Step 1

Connect and start recording

Not recording

One button finds the supported connection for your wearable. Recording begins when the first heart-rate reading arrives.

Ready to connect.

Connection help and supported devices

Wear or activate the device and enable heart-rate broadcast mode when it has one.
Close the wearable companion app because many devices accept only one live connection.
Tap Connect wearable and wait for the first heart-rate value.

The mobile app is recommended. Chrome or Edge can provide active-tab recording as a web backup.

Supported protocols include Colmi UART and the standard BLE Heart Rate Service.
Some chest straps and sports watches work after heart-rate broadcast mode is enabled.
Apple Watch, Oura, Fitbit and Galaxy Watch proprietary connections are not included.
Bluetooth pairing alone does not guarantee that a device shares live heart rate.

Technical details for troubleshooting

Connection events

Waiting for a wearable

Diagnostic events will appear here when a connection is attempted.

Android recording continues with the screen locked while the AppetiteCheck notification remains active.
The iOS app uses Bluetooth background mode, but must not be force-quit. Browser capture must remain open and active.
This research app does not control stimulation, diagnose conditions, or provide emergency monitoring.

Step 2

Before stimulation

Complete this check-in before stimulation begins. Answer for how you feel right now.

How hungry do you feel?

Not at all4Extremely

How satisfied do you feel?

Empty4Completely satisfied

How full do you feel?

Not full4Completely full

How much could you eat right now?

Nothing4A large meal

How strong are your food cravings?

No cravings4Very strong

Save the baseline heart rate

Wait for a stable live reading, then save. AppetiteCheck uses the most recent timestamped readings for this baseline.

Required before stimulation begins

Step 3

Complete the stimulation

Your baseline has been saved. Keep the wearable in place while you complete the stimulation session.

Session recording is active

Elapsed time 0 minutes

Return to AppetiteCheck as soon as the stimulation is complete.
On Android, you may lock the screen or use another app while the monitoring notification stays active.
On iPhone, do not force-quit the app. On the web, keep this tab open and active.

Tap Stimulation complete below only when the session has ended.

Step 4

After stimulation

Complete this check-in immediately after stimulation and answer for how you feel now.

Which condition did you use today?

Session duration (minutes)

0 min1030 min

Stimulation intensity

Low5High

How hungry do you feel now?

Not at all4Extremely

How satisfied do you feel now?

Empty4Completely satisfied

How full do you feel now?

Not full4Completely full

How much could you still eat?

Nothing4A large meal

How strong are your food cravings now?

No cravings4Very strong

Save the response heart rate

Keep the wearable in place and save a fresh reading collected after the baseline.

Required before you can continue

Step 5

Your experience

Please rate each statement by tapping one option. There are no right or wrong answers.

Step 6

Review and submit

These notes are optional. Add anything that would help the research team interpret this session.

How did the stimulation feel? Any sensations? How was using the device today? Anything affect your appetite today? Any other comments?

Your responses have been recorded. Click submit when ready.

Researcher Dashboard

Review submitted sessions, manage research records and download analysis-ready data.

This dashboard shows completed submissions. It refreshes automatically but does not display a participant's live heart rate before submission.

Participants

Total Sessions

Excluded

Inactive

Sessions with HR

Mobile BLE sessions

Average appetite change

Participant Session Trend

Select one participant to compare before vs after hunger and craving across sessions.

Top panel = hunger. Bottom panel = craving. In each session, left bar = before and right bar = after.

Participant

Analysis-ready exports

Filters apply to both downloads. Session summaries contain questionnaire outcomes. Heart-rate samples contain one row per received reading with UTC timing and study phase.

Participant Condition From session date Through session date

Session Management

Exclude pilot runs, duplicates or protocol deviations without erasing the original record. Excluded sessions remain available in the audit history.

#	Participant	Date	Condition	HR Source	Hunger Δ	Craving Δ	Fullness Δ	Overall Δ	Submitted
Loading participant data...

Participant Management

Deactivate access while preserving research history. Permanent removal requires written confirmation and remains in the audit trail.

Participant	Status	Sessions	Last Session	Management
Loading participants...

Administrative audit trail

Every exclusion, restoration, status change, and permanent purge records the administrator, reason, entity, and UTC timestamp.

No administrative actions recorded.