# Histamine Intolerance Scanner vs Mast'O

The clearest difference is update cadence: Histamine Intolerance Scanner at every 3 days against Mast'O's every 14 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Histamine Intolerance Scanner ships an update every 3 days, Mast'O every 14 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Histamine Intolerance Scanner | Mast'O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/histamine-intolerance-scanner/id1640339997/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 14 months |
| Monetization | Free | — |
| Size | 45 MB | 27 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Jeremy Roustang](https://appshunter.io/developer/595131737) | [Filière MaRIH](https://appshunter.io/developer/1727106794) |

## What reviewers say

### Histamine Intolerance Scanner

[App page](https://appshunter.io/ios/app/histamine-intolerance-scanner/id1640339997)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Mast'O

[App page](https://appshunter.io/ios/app/masto/id6476554444)

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

**In-app purchases:** none


## Frequently asked questions

### Is Histamine Intolerance Scanner free?

Histamine Intolerance Scanner is free to download, with no in-app purchases.

### Is Mast'O free?

Mast'O is free to download, with no in-app purchases.

### Do Histamine Intolerance Scanner or Mast'O have ads?

Neither Histamine Intolerance Scanner nor Mast'O shows ads.

### Which is updated more often, Histamine Intolerance Scanner or Mast'O?

Histamine Intolerance Scanner ships an update every 3 days, and Mast'O every 14 months. Most recently, Histamine Intolerance Scanner was updated on October 24, 2026 and Mast'O 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.*