# TDF Calc vs Rad Onc Tables

The clearest difference is price: TDF Calc at Free against Rad Onc Tables's $9.99. TDF Calc also leads on iOS requirement (13.2 vs 17.0). Rad Onc Tables's advantage is update cadence (every 2 weeks vs every 67 months) and ratings volume (23 vs 1). On rating, review sentiment, ads and in-app purchases there is nothing between them.

TDF Calc is free to download; Rad Onc Tables costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for TDF Calc against 5.0 for Rad Onc Tables. That said, the two scores are not equally well evidenced: Rad Onc Tables has 23 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

TDF Calc ships an update every 67 months, Rad Onc Tables every 2 weeks. The most recent releases landed on October 31, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | TDF Calc | Rad Onc Tables |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tdf-calc/id312749340/reviews)** | [5.0 (23 ratings)](https://appshunter.io/ios/app/rad-onc-tables/id1435398887/reviews) |
| Number of ratings | 1 | **23** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 67 months | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#117** |
| Size | 2 MB | 49 MB |
| Requires iOS | **13.2** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Eye Physics](https://appshunter.io/developer/312749343) | [Matthew Culbert](https://appshunter.io/developer/1435398886) |

## 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


### Rad Onc Tables

[App page](https://appshunter.io/ios/app/rad-onc-tables/id1435398887)

**Currently charting:** #117 Top Paid · Medical (US App Store)

Access concise research summaries and direct links for radiation oncology. This tool aids professionals in quickly finding and referencing relevant studies.

**Highlights:** Quick research summaries, Direct research links, Radiation oncology focus, Reference tool, Summarized findings

**Features:** macOS Compatibility, 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 Rad Onc Tables free?

Rad Onc Tables costs $9.99, with no in-app purchases.

### Which has better reviews, TDF Calc or Rad Onc Tables?

TDF Calc is rated higher. TDF Calc averages 5.0 out of 5 from 1 ratings, while Rad Onc Tables averages 5.0 from 23 ratings.

### Do TDF Calc or Rad Onc Tables have ads?

Neither TDF Calc nor Rad Onc Tables shows ads.

### Which is updated more often, TDF Calc or Rad Onc Tables?

TDF Calc ships an update every 67 months, and Rad Onc Tables every 2 weeks. Most recently, TDF Calc was updated on October 31, 2026 and Rad Onc Tables on November 2, 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.*