# ICCR vs PTX Refer

The clearest difference is update cadence: PTX Refer at every 4 weeks against ICCR's every 33 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.

ICCR ships an update every 33 months, PTX Refer every 4 weeks. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ICCR | PTX Refer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/iccr/id717358930/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 37 MB | 27 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 9+ |
| Developer | [ORAU](https://appshunter.io/developer/630626943) | [PTX Therapy, LLC](https://appshunter.io/developer/1477160200) |

## What reviewers say

### ICCR

[App page](https://appshunter.io/ios/app/iccr/id717358930)

This reference tool provides information on internal contamination with radionuclides and their medical countermeasures. It estimates reference concentrations in urine based on hypothetical patient scenarios and standard biokinetic models. The app is designed for professionals interested in radioactive material contamination and therapy.

**Highlights:** Radionuclide and medical countermeasure reference information, Hypothetical patient scenario assessments, Reference concentration estimation in urine, Save, edit, and share assessments, Information on internal contamination and therapy

**Features:** macOS Compatibility

**In-app purchases:** none


### PTX Refer

[App page](https://appshunter.io/ios/app/ptx-refer/id1518033694)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ICCR free?

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

### Is PTX Refer free?

PTX Refer is free to download, with no in-app purchases.

### Do ICCR or PTX Refer have ads?

Neither ICCR nor PTX Refer shows ads.

### Which is updated more often, ICCR or PTX Refer?

ICCR ships an update every 33 months, and PTX Refer every 4 weeks. Most recently, ICCR was updated on October 13, 2026 and PTX Refer on October 10, 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.*