# Rad Onc Calc vs INSPIRE RT

The clearest difference is update cadence: Rad Onc Calc at every 6 weeks against INSPIRE RT's every 4 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.

Rad Onc Calc ships an update every 6 weeks, INSPIRE RT every 4 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Rad Onc Calc | INSPIRE RT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/rad-onc-calc/id1494077153/reviews)** | — |
| Number of ratings | **12** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free | — |
| Size | 57 MB | 33 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Matthew Culbert](https://appshunter.io/developer/1435398886) | [INSPIRE-RT PTY LTD](https://appshunter.io/developer/1786370116) |

## What reviewers say

### Rad Onc Calc

[App page](https://appshunter.io/ios/app/rad-onc-calc/id1494077153)

A radiation oncology calculator and reference tool for medical professionals. It provides quick access to essential calculations and treatment constraints.

**Highlights:** Radiation oncology calculations, Treatment constraints reference, Quick access to essential data, Comprehensive tool for professionals

**Features:** macOS Compatibility

**In-app purchases:** none


### INSPIRE RT

[App page](https://appshunter.io/ios/app/inspire-rt/id6739632336)

**In-app purchases:** none


## Frequently asked questions

### Is Rad Onc Calc free?

Rad Onc Calc is free to download, with no in-app purchases.

### Is INSPIRE RT free?

INSPIRE RT is free to download, with no in-app purchases.

### Do Rad Onc Calc or INSPIRE RT have ads?

Neither Rad Onc Calc nor INSPIRE RT shows ads.

### Which is updated more often, Rad Onc Calc or INSPIRE RT?

Rad Onc Calc ships an update every 6 weeks, and INSPIRE RT every 4 months. Most recently, Rad Onc Calc was updated on October 29, 2026 and INSPIRE RT on October 30, 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.*