# TDF Calc vs BED LQ Calc

The clearest difference is update cadence: BED LQ Calc at daily against TDF Calc's every 67 months. TDF Calc's advantage is iOS requirement (13.2 vs 18.0). On price, rating, review sentiment and ratings volume 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 Calc against 5.0 for BED LQ Calc. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

TDF Calc ships an update every 67 months, BED LQ Calc daily. The most recent releases landed on October 31, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | TDF Calc | BED LQ Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/tdf-calc/id312749340/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/bed-lq-calc/id6749206758/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 67 months | **Daily** |
| Monetization | Free | Free |
| Size | 2 MB | 1 MB |
| Requires iOS | **13.2** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eye Physics](https://appshunter.io/developer/312749343) | [Gorkem Gungor](https://appshunter.io/developer/1829280583) |

## 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


### 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 Calc free?

TDF Calc 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 Calc or BED LQ Calc?

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

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

Neither TDF Calc nor BED LQ Calc shows ads.

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

TDF Calc ships an update every 67 months, and BED LQ Calc daily. Most recently, TDF Calc was updated on October 31, 2026 and BED LQ Calc 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.*