See the pattern
behind how
you feel.

Mast Cell Activation Syndrome hides in patterns. The MCT-1 wearable biosensor and companion app turn scattered symptoms into something you can finally read — with over 2,000+ downloads on iPhone and Android.

Download the app Meet the MCT-1

The MastCell Tracker MCT-1 wearable biosensor — The MCT-1 Biosensor Continuous, wearable, real-time

2,000+Downloads on iOS & Android

7-dayBattery on a single charge

Real-timeContinuous biosignal capture

NonprofitCare over profit, always

01Why it matters

Most people with MCAS spend years without answers. We built the tools to shorten that.

The device

A biosensor made for continuous wear.

The MCT-1 sits comfortably against the skin and quietly reads your biosignals around the clock — no wires, no fuss, up to a week between charges.

01 Real-time signal capture, day and night
02 Up to seven days on a single charge
03 Built and validated for everyday life

Explore the MCT-1 →

The app

Months of symptoms, one clear picture.

Symptom scores, trigger correlations, and biosignal trends come together in a dashboard designed with patients — so a rough month becomes a readable story.

01 Log symptoms and triggers in seconds
02 See the patterns behind your flares
03 Export clinician-ready reports

See the app →

02Dispatches

01 How we validate MCT-1 device and model safetyBench testing, clinical correlation, and continuous monitoring for reliable results. Device SafetyJul 31, 2026 02 The real cost of MCAS — and why access mattersWhere the costs come from, and how monitoring plus nonprofit pricing can lower them. AccessJul 28, 2026 03 Understanding your MCAS dataA plain-language guide to reading your symptom score, triggers, and biosignal trends. EducationJul 24, 2026 04 Our patient-data ethics and safety commitmentsStrong encryption, real consent, and a promise never to sell your data. Data EthicsJul 22, 2026

All news & research →

Care, not profit

We answer to patients, not shareholders — and we're building coverage so cost is never the barrier.

See how coverage works

MastCell Tracker is a nonprofit. Any surplus goes back into research, patient assistance, and access.

Get started

Start reading your body's notes.

Join over 2,000 people already tracking their symptoms, triggers, and biosignals with MastCell Tracker — free on iPhone and Android.

App Store Google Play

MastCell Tracker for iPhone & Android

See the patternbehind howyou feel.

A biosensor made for continuous wear.

Months of symptoms, one clear picture.

Start reading your body's notes.

See the pattern
behind how
you feel.