# CDN STBBI Guidelines vs EQD2 Calculator

The clearest difference is update cadence: EQD2 Calculator at monthly against CDN STBBI Guidelines's every 4 months. EQD2 Calculator also leads on iOS requirement (10.0 vs 13.0). On price, review sentiment, 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.

CDN STBBI Guidelines ships an update every 4 months, EQD2 Calculator monthly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | CDN STBBI Guidelines | EQD2 Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/eqd2-calculator/id1200344433/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free | Free |
| Size | 29 MB | 17 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Health Canada / Santé Canada](https://appshunter.io/developer/408663392) | [Jon Giambattista](https://appshunter.io/developer/983771622) |

## What reviewers say

### CDN STBBI Guidelines

[App page](https://appshunter.io/ios/app/cdn-stbbi-guidelines/id958263397)

This app offers Canadian health professionals current recommendations for screening, diagnosing, managing, and treating sexually transmitted infections (STIs). It's based on updated guidelines and complementary resources, focusing on uncomplicated STIs in adults and youth.

**Highlights:** STI screening recommendations, Diagnosis guidance, Management protocols, Treatment strategies, Antibiotic-resistant gonorrhea updates, Concise and easy-to-use format

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

**In-app purchases:** none


### EQD2 Calculator

[App page](https://appshunter.io/ios/app/eqd2-calculator/id1200344433)

Calculate radiation dose in equivalent 2 Gy fractions and biological equivalent dose (BED). The app offers selectable alpha beta ratios for normal tissues and tumors, and includes a dose conversion mode for custom calculations.

**Highlights:** Calculate EQD2, Calculate BED, Selectable alpha beta ratios, Dose conversion mode, Custom dose per fraction calculation

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

**In-app purchases:** none


## Frequently asked questions

### Is CDN STBBI Guidelines free?

CDN STBBI Guidelines is free to download, with no in-app purchases.

### Is EQD2 Calculator free?

EQD2 Calculator is free to download, with no in-app purchases.

### Do CDN STBBI Guidelines or EQD2 Calculator have ads?

Neither CDN STBBI Guidelines nor EQD2 Calculator shows ads.

### Which is updated more often, CDN STBBI Guidelines or EQD2 Calculator?

CDN STBBI Guidelines ships an update every 4 months, and EQD2 Calculator monthly. Most recently, CDN STBBI Guidelines was updated on November 1, 2026 and EQD2 Calculator on November 4, 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.*