Comparison

Mast'O vs MCAS Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Mast'O

Features
Read full description

Application pour smartphones et tablettes destinée aux personnes atteintes de mastocytoses ou syndrome d’activation mastocytaire (SAMA). Cette application contient de nombreuses fonctionnalités pour vous aider au suivi de votre maladie dans votre vie quotidienne. Parmi ces fonctionnalités : - Une page profil pour renseigner les informations importantes de votre dossier médical (antécédents, allergies etc…) - Un répertoire pour enregistrer les coordonnées de vos médecins. - Un journal de bord pour documenter vos symptômes, état de santé et/ou moral. - L’ajout de photos pour vos symptômes visibles. - Un porte document pour toujours avoir vos documents importants sur vous comme les comptes rendus d’examens. - Créer des rappels pour vos rendez-vous. - Préparer votre prochain rendez-vous avec votre médecin. - Créer des rappels pour vos prises de médicaments. - Un historique de vos traitements. - Des liens vers les recommandations spécifiques à la maladie utiles aux professionnels de santé qui prennent en charge et vers la carte des centres maladies rares - Générer un rapport PDF pour partager facilement vos observations. - Un thème contrasté pour un affichage optimisé pour de forts contrastes. - Ajout de symptômes fréquents pour enrichir vos observations plus rapidement. - Un menu “Paramètres & données” pour gérer vos thèmes, exports et imports depuis un seul endroit. - Import/Export pour sauvegarder et restaurer vos données sécurisées sur un nouveau téléphone en toute simplicité. Aucun compte n’est requis. Les données sont stockées sur votre appareil et non sur un cloud. Une fonction d’export des données est prévue pour que vous puissiez migrer vos données vers votre nouvel appareil si besoin.

About

MCAS Tracker

This app helps individuals manage Mast Cell Activation Syndrome by tracking symptoms, food intake, and environmental triggers. It offers advanced analytics to identify patterns and provides secure, exportable reports for healthcare providers. The app aims to offer clarity and actionable insights for better health management.

Highlights
  • 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
Features
Read full description

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/

Screenshots

Mast'O4 screens
MCAS Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: Mast'O at none against MCAS Tracker's 10. MCAS Tracker's advantage is update cadence (every 6 months vs every 14 months) and device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. MCAS Tracker sells 10 in-app purchases, starting at $7.99 per 7 days. Mast'O asks for nothing beyond the download.

UpkeepUpdate frequency

Mast'O ships an update every 14 months, MCAS Tracker every 6 months. The most recent releases landed on November 8, 2026 and November 1, 2026 respectively.

Scorecard3 real differences · 7 level
Mast'O versus MCAS Tracker: the parameters behind the verdict, then further details
ParameterMast'OMCAS Tracker
PriceFreeFree
Rating—4.4 (21 ratings) — better
Positive reviews—75.0% of reviews
Number of ratings—21 — better
Update frequencyEvery 14 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.0 — better15.5
Further details — not scored
Size27 MB238 MB
Age rating12+4+
DeveloperFilière MaRIHDigital Therapeutics

In-app purchases

None

Mast'O

No in-app purchases

10 purchases

MCAS Tracker

Subscriptions8
  • easy pass$7.997 Days
  • flex pass$12.991 Month
  • carey ai max$19.991 Month
Show 5 more
  • carey ai ultra$29.991 Month
  • plus$29.991 Year
  • limited discount$34.991 Year
  • yearly access3 Days trial$39.991 Year
  • Extended Trial3 Days trial$39.991 Year
One-time2
  • carey ai credits$8.99
  • lifetime upgrade$119.99

Questions

Is Mast'O free?
Mast'O is free to download, with no in-app purchases.
Is MCAS Tracker free?
MCAS Tracker is free to download, with in-app purchases available.
Do Mast'O or MCAS Tracker have ads?
Neither Mast'O nor MCAS Tracker shows ads.
Which is updated more often, Mast'O or MCAS Tracker?
Mast'O ships an update every 14 months, and MCAS Tracker every 6 months. Most recently, Mast'O was updated on November 8, 2026 and MCAS Tracker on November 1, 2026.

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