# TDF Calc vs NCCN Guidelines®

The clearest difference is review sentiment: TDF Calc at 100% against NCCN Guidelines®'s 13%. TDF Calc also leads on rating (5.0 vs 3.6) and iOS requirement (13.2 vs 15.0). NCCN Guidelines®'s advantage is update cadence (every 2 months vs every 67 months) and ratings volume (24 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TDF Calc holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: NCCN Guidelines® has 24 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of TDF Calc's written reviews are positive against 13% of NCCN Guidelines®'s.

TDF Calc ships an update every 67 months, NCCN Guidelines® every 2 months. The most recent releases landed on October 14, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | TDF Calc | NCCN Guidelines® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tdf-calc/id312749340/reviews)** | [3.6 (24 ratings)](https://appshunter.io/ios/app/nccn-guidelines/id775500217/reviews) |
| Number of ratings | 1 | **24** |
| Positive reviews | **100.0% of reviews** | 12.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 67 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 2 MB | 168 MB |
| Requires iOS | **13.2** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Eye Physics](https://appshunter.io/developer/312749343) | [National Comprehensive Cancer Network®](https://appshunter.io/developer/1168594705) |

## What reviewers say

### TDF Calc

[App page](https://appshunter.io/ios/app/tdf-calc/id312749340)

This app calculates the biologically effective dose (BED) for radiation therapy fractionation regimens. It allows for comparisons of different treatment schedules and helps determine dose per fraction based on desired treatment duration.

**Highlights:** Linear-quadratic (LQ) method implementation, Biologically effective dose (BED) calculation, External beam radiation therapy (EBRT) fractionation, Low dose rate (LDR) brachytherapy, Permanent implant brachytherapy, Dose per fraction calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### NCCN Guidelines®

[App page](https://appshunter.io/ios/app/nccn-guidelines/id775500217)

This app provides healthcare professionals with convenient access to comprehensive clinical practice guidelines for oncology. It aims to improve the quality and effectiveness of cancer care by offering evidence-based recommendations for diagnosis, treatment, and supportive services.

**Highlights:** Virtual Library of NCCN Guidelines, Oncology clinical practice guidelines, Evidence-based recommendations, Supports cancer care decision-making, Covers 97% of US cancer cases

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TDF Calc free?

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

### Is NCCN Guidelines® free?

NCCN Guidelines® is free to download, with no in-app purchases.

### Which has better reviews, TDF Calc or NCCN Guidelines®?

TDF Calc is rated higher. TDF Calc averages 5.0 out of 5 from 1 ratings, while NCCN Guidelines® averages 3.6 from 24 ratings.

### Do TDF Calc or NCCN Guidelines® have ads?

Neither TDF Calc nor NCCN Guidelines® shows ads.

### Which is updated more often, TDF Calc or NCCN Guidelines®?

TDF Calc ships an update every 67 months, and NCCN Guidelines® every 2 months. Most recently, TDF Calc was updated on October 14, 2026 and NCCN Guidelines® on October 29, 2026.

---

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