# ORB Calculator vs Guide Dose

The clearest difference is in-app purchases: ORB Calculator at none against Guide Dose's 2. ORB Calculator also leads on iOS requirement (9.0 vs 15.5). On price, ads and device support there is nothing between them.

Both are free to download. Guide Dose sells 2 in-app purchases, starting at $9.99 per month. ORB Calculator asks for nothing beyond the download.

## The numbers

| Metric | ORB Calculator | Guide Dose |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 85.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | — | Subscription |
| Size | 19 MB | 144 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [The University of Edinburgh](https://appshunter.io/developer/428517240) | [MedCalc](https://appshunter.io/developer/1699306069) |

## What reviewers say

### ORB Calculator

[App page](https://appshunter.io/ios/app/orb-calculator/id1497869769)

**Features:** macOS Compatibility

**In-app purchases:** none


### Guide Dose

[App page](https://appshunter.io/ios/app/guide-dose-for-physicians/id6453359266)

This app provides healthcare professionals and students with quick access to clinical information, drug doses, and decision-support tools. It features a structured experience for study, reference, and organizing medical data, including AI-powered informational support.

**Highlights:** Search by medication or indication, Patient profile for contextualized readings, Organized clinical references and labeling, Modules on physiology, medications, and CPR, Clinical AI for informational support, Protocols and consultation flows, Auxiliary clinical tools

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Guide Dose Pro (monthly) | $9.99 | per month |
| Guide Dose Pro (annual) | $69.99 | per year |


## Frequently asked questions

### Is ORB Calculator free?

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

### Is Guide Dose free?

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

### Do ORB Calculator or Guide Dose have ads?

Neither ORB Calculator nor Guide Dose shows ads.

---

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