Comparison

Histamine Intolerance Scanner 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

Histamine Intolerance Scanner

This app helps you identify ingredients that may cause histamine intolerance. It provides a searchable database of over 1000 ingredients with varying intolerance levels.

Highlights
  • Searchable ingredient database
  • Over 1000 ingredients listed
  • Intolerance level indicators
  • Quick ingredient lookup
Features
Read full description

Is this food right for you? Scan a product's ingredient list or barcode and see at a glance what is well or poorly tolerated with histamine intolerance. SCAN PRODUCTS • Take a photo of the ingredient list: the text is read right on your phone, in English or French • Or scan the barcode: the ingredients come from the Open Food Facts database • Every recognized ingredient gets a rating from 0 (well tolerated) to 3 (very poorly tolerated), additives and E numbers included (E330, E621…) • Words like "smoked", "aged", "cured", "fermented" or "canned" on the label are taken into account FRESHNESS CHANGES EVERYTHING • Histamine builds up over time: fresh minced meat is well tolerated, the same meat kept a few days in the fridge much less so • The app warns you whenever a food can get riskier: pre-packed, leftovers, fish that isn't very fresh, aged cheese… • "Cautious scan" option: when the label says nothing, the scan uses the worst case 675 RESEARCHED FOODS • Meat, fish, dairy, fruit, vegetables, grains, drinks, spices and additives • Ratings aligned with the SIGHI food compatibility list and backed by published content measurements • For each food: why it can be a problem (high in histamine, other amines, liberator, DAO blocker), variants by preparation, and sources you can open • When data is thin, the app says so YOUR OWN EXPERIENCE • Rate how you tolerate each food: your rating shows next to the reference rating, in lists and scan results • Find all your ratings in a dedicated tab SIMPLE AND PRIVATE • Free, no ads, no account needed • Your ratings stay on your phone • In English and French This information is a guide only and does not replace advice from a doctor or dietitian.

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

Histamine Intolerance Scanner4 screens
MCAS Tracker4 screens

Verdict

The call

The clearest difference is rating: MCAS Tracker at 4.4 against Histamine Intolerance Scanner's 3.0. MCAS Tracker also leads on ratings volume (21 vs 4) and device support (4 vs 2). Histamine Intolerance Scanner's advantage is in-app purchases (none vs 16) and update cadence (every 3 days vs every 6 months). 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 16 in-app purchases, starting at $4.95 per month. Histamine Intolerance Scanner asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MCAS Tracker holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: MCAS Tracker has 21 ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Histamine Intolerance Scanner ships an update every 3 days, MCAS Tracker every 6 months. Both last shipped on October 24, 2026.

Scorecard6 real differences · 4 level
Histamine Intolerance Scanner versus MCAS Tracker: the parameters behind the verdict, then further details
ParameterHistamine Intolerance ScannerMCAS Tracker
PriceFreeFree
Rating3.0 (4 ratings)4.4 (21 ratings) — better
Positive reviews—75.0% of reviews
Number of ratings421 — better
Update frequencyEvery 3 days — betterEvery 6 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod, Apple Watch — better
Requires iOS16.415.5 — better
Further details — not scored
Size45 MB238 MB
Age rating4+4+
DeveloperJeremy RoustangDigital Therapeutics

Customer experience

Histamine Intolerance Scanner

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

MCAS Tracker

All ratings18 ratings
Positive83.3%
Neutral11.1%
Negative5.6%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

None

Histamine Intolerance Scanner

No in-app purchases

16 purchases

MCAS Tracker

Subscriptions13
  • flex pass$4.951 Month
  • easy pass$7.997 Days
  • flex pass$12.991 Month
Show 10 more
  • carey ai max$19.991 Month
  • yearly access$19.991 Year
  • smart pass$19.991 Year
  • carey ai ultra$29.991 Month
  • plus$29.991 Year
  • limited discount$34.991 Year
  • Premium Yearly$34.991 Year
  • yearly access3 Days trial$39.991 Year
  • Extended Trial3 Days trial$39.991 Year
  • full access7 Days trial$49.991 Year
One-time3
  • store credit$1.99
  • carey ai credits$8.99
  • lifetime upgrade$119.99

Questions

Is Histamine Intolerance Scanner free?
Histamine Intolerance Scanner is free to download, with no in-app purchases.
Is MCAS Tracker free?
MCAS Tracker is free to download, with in-app purchases available.
Which has better reviews, Histamine Intolerance Scanner or MCAS Tracker?
MCAS Tracker is rated higher. Histamine Intolerance Scanner averages 3.0 out of 5 from 4 ratings, while MCAS Tracker averages 4.4 from 21 ratings.
Do Histamine Intolerance Scanner or MCAS Tracker have ads?
Neither Histamine Intolerance Scanner nor MCAS Tracker shows ads.
Which is updated more often, Histamine Intolerance Scanner or MCAS Tracker?
Histamine Intolerance Scanner ships an update every 3 days, and MCAS Tracker every 6 months. Most recently, Histamine Intolerance Scanner was updated on October 24, 2026 and MCAS Tracker on October 24, 2026.

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