# MCAS Tracker — Mast Cell Symptom Flare Diary

> Mast Cell Activation Syndrome symptom and trigger tracking with analytics. (iPhone/iPad app by Digital Therapeutics.)

- Source: https://appshunter.io/ios/app/mcas-tracker/id6754931863 (this page in markdown: same URL + `.md`)
- Developer: [Digital Therapeutics](https://appshunter.io/developer/1721663167)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Rating: 4.50/5 from 18 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.5 · 238 MB
- Languages: American English, Afrikaans, Albanian, Amharic, Arabic, Azerbaijani, Belarusian, Bangla, Bulgarian, Burmese and 63 more
- Released: 2025-12-09
- Data updated: 2026-09-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/mcas-tracker/id6754931863/reviews.md

## What is MCAS Tracker?

This MCAS Tracker helps you manage mast cell activation symptoms through structured tracking, advanced analytics, and personalized insights. Designed for people living with Mast Cell Activation Syndrome, it provides clarity around reactions, histamine triggers, and symptom cycles, helping you understand what causes flare-ups and how to prevent them. With precise tools for daily tracking, it transforms complex data into actionable health insights.

Track and Understand Your Reactions
- Quick symptom tracking - Record hives, itching, flushing, headaches, GI distress, or breathing issues in seconds to capture your full experience.
- Food and supplement logs - Track meals, ingredients, and supplements to uncover patterns that cause histamine intolerance or trigger mast cell reactions.
- Trigger identification - Log environmental, emotional, and seasonal factors to discover what contributes to your flare-ups.
- Advanced analytics - View charts and correlations linking food, stress, sleep, and reactions to pinpoint your top triggers and patterns over time.
- Medication tracking - Log antihistamines, mast cell stabilizers, or EpiPen use to monitor effectiveness and consistency.
- Daily health journal - Combine symptom notes, mood, and activity levels for a complete picture of your condition each day.
- Secure, exportable reports - Generate PDF or CSV summaries to share with allergists, immunologists, or healthcare providers for data-driven care.
- Encrypted storage - Protect sensitive health data with strong encryption and optional Face ID or Touch ID authentication.

Built for Daily Use
- Simple, user-friendly design - Quickly record symptoms and insights without extra effort.
- Apple Health integration - Sync metrics like heart rate, sleep, and activity to understand how physical health impacts mast cell responses.
- Personalized reminders - Stay on track with alerts for medications, hydration, meals, or journaling.
- Goal tracking - Set goals like reducing flare frequency or improving sleep quality and visualize progress through trend charts.
- Correlation analysis - Identify which foods, times, or environments consistently cause flare-ups or relief.
- Offline and cloud backup - Log entries anytime with automatic syncing when reconnected.
- Regular updates - Access new tools and refinements designed to make symptom tracking effortless and accurate.

Go Beyond Reaction Tracking
- Custom MCAS tracker plan - Follow guided steps to monitor symptoms, medications, and triggers across days or weeks.
- Comprehensive health record - Track everything from diet, supplements, sleep, and bowel patterns to stress and emotional states in one connected system.
- Educational insights - Learn about mast cell activation, low-histamine diets, and lifestyle adjustments that support stability.
- Lab and test logging - Record lab results and notes from medical appointments to maintain a complete personal health record.
- Activity and wellness tracking - Track rest, exercise, and stress to balance recovery and prevent overexertion.

Start Managing MCAS with Confidence
Setup is fast - start logging symptoms, tracking reactions, and uncovering your personal triggers in minutes. Choose a flexible subscription plan and manage it directly through the Apple Store. Every feature in this tracker is built to help you identify patterns, reduce uncertainty, and feel more in control of your health.

Transform data into understanding and find the balance your body needs. Start tracking today to uncover your triggers and take the next step toward stability and better quality of life.

Any insights provided by this MCAS Tracker do not constitute medical advice. The app is designed for tracking purposes only and is not intended to diagnose, treat, cure, or prevent any disease or condition.
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Symptom tracking (hives, itching, flushing)
- Food and supplement logging
- Trigger identification (environmental, emotional)
- Advanced analytics and correlation analysis
- Medication tracking
- Daily health journal
- Secure, exportable reports

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| flex pass | $12.99 | per month |
| carey ai max | $19.99 | per month |
| carey ai ultra | $29.99 | per month |
| limited discount | $34.99 | per year |
| plus | $29.99 | per year |
| yearly access | $39.99 | per year |
| Extended Trial | $39.99 | per year |
| Premium Yearly | $34.99 | per year |
| yearly access | $19.99 | per year |
| flex pass | $4.95 | per month |
| full access | $49.99 | per year |
| smart pass | $19.99 | per year |
| easy pass | $7.99 | per 7 days |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| carey ai credits | $8.99 | one-time |
| lifetime upgrade | $119.99 | one-time |
| store credit | $1.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/mcas-tracker/id6754931863/reviews.md

### 4/5 — New user

*2026-07-13*

I just started using the app and feel it has a lot of very useful tools. However, it seems there are bugs that need to be fixed. When I check items off my reminder list and change the time because I’m a little late on marking them complete but then I’ll go back in to the app later and notice the reminders are appearing again as undone. This has happened multiple times.

**Developer response:** Tracking MCAS symptoms consistently is one of the best ways to spot patterns, so it is great that the tools are clicking for you. The reminder behavior you are describing, where completed items reappear as undone after editing the time, is not expected. A recent update included improvements that may have addressed this, so updating to the latest version is worth trying first. If it keeps happening after that, reach out to support with your device model and OS version so the team can dig into your specific setup and get your medication logs staying accurate.

### 5/5 — Very useful

*2026-06-11*

Setting up MCAS Tracker was quick and straightforward, and I was logging symptoms, meals, and medications within minutes. The trigger correlation feature has been the most helpful for me because it helped me notice that certain high histamine foods and stressful days were often followed by flushing and headaches. I use the app daily to track different symptoms like skin reactions, digestive issues, fatigue, sleep, and medication responses, and the reports make it much easier to understand patterns over time.

**Developer response:** Spotting that high histamine foods and stressful days kept showing up right before flushing and headaches is exactly the kind of pattern that is so hard to catch in the moment but jumps out once it is all logged in one place. That correlation insight only gets sharper the more you track, so the skin reactions, digestive issues, fatigue, sleep, and medication responses you are recording daily are quietly building a much clearer picture of your triggers. The reports pulling it all into a readable health summary you can actually act on, or bring to an appointment, is where symptom tracking really earns its keep. Keep at it, and thanks for sharing how it is working for you.

### 5/5 — App review

*2026-06-08*

I just want to say I’m really mind blown about this app already, and I just got started. They say health is wealth, which it true and very important. I have a feeling I’m going to have a great time with this app. Amazing job developers.

**Developer response:** That kind of energy right out of the gate is always great to hear. You are absolutely right that health is wealth, and the real value kicks in once you start building a consistent habit with your symptom tracking and daily logs. After a couple of weeks of check-ins, the patterns and correlations start to surface, and that is where things get really interesting. Enjoy the journey, and welcome aboard.

### 2/5 — Needs Improvement

*2026-05-14*

The tracker keeps deleting my information. I have completed my profile at least five times now. It’s deleted again. Also it keeps deleting the medications in the medication tab.

**Developer response:** This isn't expected behavior, and we'd want to look into your specific account to understand what's happening. Updating to the latest version from the App Store often resolves sync-related issues with older builds. If your tracking data still isn't holding after updating, reach out to us directly so we can take a closer look.

## Frequently asked questions about MCAS Tracker

### What is MCAS Tracker used for?

MCAS Tracker is used to meticulously log and analyze symptoms, food intake, environmental factors, and medications related to Mast Cell Activation Syndrome. It aims to help users identify personal triggers and patterns contributing to flare-ups.

### Does MCAS Tracker have ads?

Yes, MCAS Tracker contains advertisements. This is common for free applications that offer in-app purchases for enhanced features or subscriptions.

### What are the subscription options for MCAS Tracker?

MCAS Tracker offers several subscription plans, including 'easy pass' at $7.99/7 days, 'flex pass' at $18.99/month, and various yearly options like 'limited sale' and 'smart pass' at $19.99/year.

### Can I share my data from MCAS Tracker with my doctor?

Yes, MCAS Tracker allows you to generate secure, exportable reports in PDF or CSV format. This feature is designed to help you share your health data with allergists, immunologists, or other healthcare providers for data-driven care.

### Does MCAS Tracker integrate with Apple Health?

Yes, MCAS Tracker integrates with Apple Health. This allows it to sync metrics such as heart rate, sleep, and activity levels, helping you understand how your physical health impacts mast cell responses.

### Is my health data safe with MCAS Tracker?

MCAS Tracker prioritizes data security with strong encryption for sensitive health information. It also offers optional Face ID or Touch ID authentication for an added layer of protection.

### How often is MCAS Tracker updated?

MCAS Tracker is regularly updated to provide new tools and refinements. The latest version was released on December 9, 2025, indicating ongoing development and support.

### What devices can I use MCAS Tracker on?

MCAS Tracker is available on Apple Watch, iPhone, and iPad, providing a versatile experience across multiple Apple devices.

## Version history (last 2 releases)

### 6.6 — 2026-06-07

This update brings enhanced care plan management, optimized symptom tracking, and streamlined report sharing.

- Track your daily care plans with added postpartum exercise routines, helping you stay on top of your mast cell activation syndrome management and navigate physical changes.
- Spot correlations between symptoms and potential histamine triggers with improved tracking performance, giving you deeper insights into your condition and informing your treatment decisions.
- Share detailed reports with your care team, including lab results and symptom patterns, to facilitate more targeted discussions and effective management of your MCAS.

We'd love to hear your thoughts. Drop us a note anytime.

### 1.0 — 2025-12-09

No release notes.

## Apps similar to MCAS Tracker

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Triggerbites AI: Food Diary](https://appshunter.io/ios/app/triggerbites-ai-food-diary/id6755041249) | 4.8 (6) | Free | Health & Fitness |
| [Caloriez: AI Calorie Tracker](https://appshunter.io/ios/app/caloriez-ai-calorie-tracker/id6753945587) | 5.0 (10) | Free | Health & Fitness |
| [MCAS Insight](https://appshunter.io/ios/app/mcas-insight/id6748612002) | 5.0 (1) | $0.99 | Health & Fitness |
| [Histamine Food List & Scanner](https://appshunter.io/ios/app/histamine-food-list-and-scanner/id6761553753) | 4.9 (15) | Free | Health & Fitness |
| [MCAS & Mastocytosis](https://appshunter.io/ios/app/mcas-and-mastocytosis/id1550794913) | 4.8 (34) | Free | Health & Fitness |
| [Histamine Tracker: Food Diary](https://appshunter.io/ios/app/histamine-tracker-food-diary/id6758752231) | 5.0 (24) | Free | Health & Fitness |

## More apps by Digital Therapeutics

- [Anxiety Tracker - Anandly](https://appshunter.io/ios/app/anxiety-tracker-anandly/id6474464008)
- [Depression Tracker](https://appshunter.io/ios/app/depression-tracker/id6474817935)
- [Bipolar Tracker](https://appshunter.io/ios/app/bipolar-tracker/id6478313737)
- [BPD Tracker](https://appshunter.io/ios/app/bpd-tracker/id6478379313)
- [Migraine Tracker Diary](https://appshunter.io/ios/app/migraine-tracker-diary/id6478436665)
- [Eating Disorder Tracker](https://appshunter.io/ios/app/eating-disorder-tracker/id6478443345)

All apps by Digital Therapeutics: https://appshunter.io/developer/1721663167

## Related topics

[mcas tracker](https://appshunter.io/ios/topics/mcas-tracker) · [histamine tracker](https://appshunter.io/ios/topics/histamine-tracker) · [digital therapeutics](https://appshunter.io/ios/topics/digital-therapeutics) · [digital therapeutic](https://appshunter.io/ios/topics/digital-therapeutic)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*