# TDF Calculator vs BED LQ Calc

TDF Calculator and BED LQ Calc both sit at 5.0 stars, but that hides the real split: 100% of BED LQ Calc's written reviews are positive against 67% of TDF Calculator's. BED LQ Calc also leads on update cadence (daily vs every 3 weeks). TDF Calculator's advantage is iOS requirement (8.0 vs 18.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. 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 Calculator against 5.0 for BED LQ Calc. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 67% of TDF Calculator's written reviews are positive against 100% of BED LQ Calc's.

TDF Calculator ships an update every 3 weeks, BED LQ Calc daily. The most recent releases landed on September 25, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | TDF Calculator | BED LQ Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/tdf-calculator/id900087159/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/bed-lq-calc/id6749206758/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free | Free |
| Size | 14 MB | 1 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Hiroyuki KATOH](https://appshunter.io/developer/898546586) | [Gorkem Gungor](https://appshunter.io/developer/1829280583) |

## What reviewers say

### TDF Calculator

[App page](https://appshunter.io/ios/app/tdf-calculator/id900087159)

This app simplifies the calculation of normal tissue tolerance dose in radiotherapy using the TDF factor. It offers an easy-to-use interface for radiation oncology professionals to quickly obtain results and understand the impact of fractionation on different tissues.

**Highlights:** Calculates TDF factors for normal tissue tolerance dose, Supports two TDF factor versions (1973 and 1986), Calculates TDF factors for three different conditions simultaneously, Automatically sums TDF factors, Calculates related total or fraction dose, Organizable with URL scheme

**Features:** macOS Compatibility

**In-app purchases:** none


### BED LQ Calc

[App page](https://appshunter.io/ios/app/bed-lq-calc/id6749206758)

This app helps radiation therapy professionals perform complex radiobiological calculations using the Linear-Quadratic (LQ) model. It supports various fractionation schemes, BED, and EQD2 conversions for accurate treatment planning and dose optimization.

**Highlights:** LQ Model Calculations, BED & EQD2 Calculations, Multiple Treatment Courses, Flexible α/β Ratio Settings, Intuitive Clinical Interface, Precise Numerical Inputs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TDF Calculator free?

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

### Is BED LQ Calc free?

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

### Which has better reviews, TDF Calculator or BED LQ Calc?

TDF Calculator and BED LQ Calc are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do TDF Calculator or BED LQ Calc have ads?

Neither TDF Calculator nor BED LQ Calc shows ads.

### Which is updated more often, TDF Calculator or BED LQ Calc?

TDF Calculator ships an update every 3 weeks, and BED LQ Calc daily. Most recently, TDF Calculator was updated on September 25, 2026 and BED LQ Calc on October 22, 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.*