# MastCell Tracker vs Seen. Symptom Tracker

The clearest difference is review sentiment: Seen. Symptom Tracker at 100% against MastCell Tracker's 33%. Seen. Symptom Tracker also leads on rating (5.0 vs 3.3) and update cadence (every 5 days vs every 3 weeks). MastCell Tracker's advantage is monetization model (free vs subscription). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Seen. Symptom Tracker holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews point the same way: 33% of MastCell Tracker's written reviews are positive against 100% of Seen. Symptom Tracker's.

MastCell Tracker ships an update every 3 weeks, Seen. Symptom Tracker every 5 days. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | MastCell Tracker | Seen. Symptom Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/mastcell-tracker/id6756976734/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/seen-symptom-tracker/id6795219800/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | **Free** | Subscription |
| Size | 17 MB | 13 MB |
| Requires iOS | 26.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Aleksandra Suman](https://appshunter.io/developer/1863992139) | [Tonya Nicole](https://appshunter.io/developer/6795219802) |

## What reviewers say

### MastCell Tracker

[App page](https://appshunter.io/ios/app/mastcell-tracker/id6756976734)

This app helps individuals with Mast Cell Activation Syndrome (MCAS) log symptoms, flares, and potential triggers. It provides a structured way to record daily experiences, fostering self-awareness and consistency in managing complex health patterns.

**Highlights:** Log MCAS symptoms, Track flare events, Identify potential triggers, Record daily patterns, Organize health experiences, Improve self-awareness

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Seen. Symptom Tracker

[App page](https://appshunter.io/ios/app/seen-symptom-tracker/id6795219800)

This app helps individuals with complex, co-occurring conditions to track their symptoms, triggers, and medications. It provides organized, dated records that can be easily interpreted by clinicians, transforming lived experience into actionable evidence for diagnosis and treatment.

**Highlights:** Fast daily symptom check-in, Customizable tracking widgets, Searchable symptom record, Patterns view for co-occurring symptoms, Charts showing symptom changes over time, Physician-ready PDF exports, Optional daily reminders, Face ID or passcode lock

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MastCell Tracker free?

MastCell Tracker is free to download, with no in-app purchases.

### Is Seen. Symptom Tracker free?

Seen. Symptom Tracker is free to download, with no in-app purchases.

### Which has better reviews, MastCell Tracker or Seen. Symptom Tracker?

Seen. Symptom Tracker is rated higher. MastCell Tracker averages 3.3 out of 5 from 3 ratings, while Seen. Symptom Tracker averages 5.0 from 3 ratings.

### Do MastCell Tracker or Seen. Symptom Tracker have ads?

Neither MastCell Tracker nor Seen. Symptom Tracker shows ads.

### Which is updated more often, MastCell Tracker or Seen. Symptom Tracker?

MastCell Tracker ships an update every 3 weeks, and Seen. Symptom Tracker every 5 days. Most recently, MastCell Tracker was updated on October 24, 2026 and Seen. Symptom Tracker on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*