# PTH Calculator vs Mensa Guide

The clearest difference is in-app purchases: PTH Calculator at none against Mensa Guide's 2. PTH Calculator also leads on iOS requirement (11.0 vs 17.0). Mensa Guide's advantage is update cadence (weekly vs every 37 months). On price, ads and device support there is nothing between them.

Both are free to download. Mensa Guide sells 2 in-app purchases, starting at $1.99 per month. PTH Calculator asks for nothing beyond the download.

PTH Calculator ships an update every 37 months, Mensa Guide weekly. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | PTH Calculator | Mensa Guide |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 72.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 37 months | **Weekly** |
| Monetization | — | Subscription |
| Size | 25 MB | 52 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Mac |
| Age rating | 4+ | 17+ |
| Developer | [AVANTO CREATIVE APPS S.L.](https://appshunter.io/developer/1080379340) | [GARMENMED, SCP](https://appshunter.io/developer/1178687025) |

## What reviewers say

### PTH Calculator

[App page](https://appshunter.io/ios/app/pth-calculator/id1137356636)

**In-app purchases:** none


### Mensa Guide

[App page](https://appshunter.io/ios/app/mensa-guide/id1205990848)

This medical reference app provides quick access to antimicrobial therapy information. It features interactive navigation, advanced search capabilities, and built-in clinical calculators. Content is continuously updated to reflect the latest medical research and guidelines.

**Highlights:** Interactive word navigation, Advanced search functionality, Pathogen filtering, Built-in clinical calculators, Continuously updated content, Inline notes and references

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| Annual Subscription | $19.99 | per year |


## Frequently asked questions

### Is PTH Calculator free?

PTH Calculator is free to download, with no in-app purchases.

### Is Mensa Guide free?

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

### Do PTH Calculator or Mensa Guide have ads?

Neither PTH Calculator nor Mensa Guide shows ads.

### Which is updated more often, PTH Calculator or Mensa Guide?

PTH Calculator ships an update every 37 months, and Mensa Guide weekly. Most recently, PTH Calculator was updated on October 26, 2026 and Mensa Guide on October 29, 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.*