# MastCell Tracker vs Tether

The clearest difference is rating: Tether at 5.0 against MastCell Tracker's 3.3. MastCell Tracker's advantage is in-app purchases (none vs 2) and ratings volume (3 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Tether sells 2 in-app purchases, starting at $5.99 per month. MastCell Tracker asks for nothing beyond the download.

Tether holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

## The numbers

| Metric | MastCell Tracker | Tether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/mastcell-tracker/id6756976734/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tether-mcas-tracker/id6781950891/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | **Free** | Freemium |
| Size | 17 MB | 3 MB |
| Requires iOS | 26.5 | 26.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Aleksandra Suman](https://appshunter.io/developer/1863992139) | [WILLIAM BARRY AGNEW](https://appshunter.io/developer/6778068361) |

## 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


### Tether

[App page](https://appshunter.io/ios/app/tether-mcas-tracker/id6781950891)

Track mast cell activation syndrome (MCAS) flares, identify triggers, and manage medications. This private app offers daily check-ins, historical data, and export options. Premium features include AI-driven insights and detailed reports for better health management.

**Highlights:** Log MCAS flares with details, Identify food and environmental triggers, Track medications and saved lists, Generate doctor-ready reports, AI trigger correlation (Premium), Apple Health sync (Premium)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tether Premium Monthly | $5.99 | per month |
| Tether Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is MastCell Tracker free?

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

### Is Tether free?

Tether is free to download, with in-app purchases available.

### Which has better reviews, MastCell Tracker or Tether?

Tether is rated higher. MastCell Tracker averages 3.3 out of 5 from 3 ratings, while Tether averages 5.0 from 1 ratings.

### Do MastCell Tracker or Tether have ads?

Neither MastCell Tracker nor Tether shows ads.

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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.*