# iLQ vs LQCalc

The clearest difference is price: iLQ at Free against LQCalc's $0.99. LQCalc's advantage is update cadence (every 10 months vs every 48 months) and iOS requirement (14.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

iLQ is free to download; LQCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iLQ ships an update every 48 months, LQCalc every 10 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | iLQ | LQCalc |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/ilq/id384465112/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 10 months** |
| Monetization | Free | — |
| Size | 3 MB | 0 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [SFjRO](https://appshunter.io/developer/384465115) | [RADLab, K.K.](https://appshunter.io/developer/1555036017) |

## What reviewers say

### iLQ

[App page](https://appshunter.io/ios/app/ilq/id384465112)

This medical app calculates radiotherapy dose equivalents using the linear-quadratic model. It allows users to select specific organs at risk or define their own alpha/beta ratios for research purposes.

**Highlights:** Linear-quadratic model calculation, Organ at risk selection, Custom alpha/beta ratio input, Research use only

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases:** none


### LQCalc

[App page](https://appshunter.io/ios/app/lqcalc/id1555260645)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iLQ free?

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

### Is LQCalc free?

LQCalc costs $0.99, with no in-app purchases.

### Do iLQ or LQCalc have ads?

Neither iLQ nor LQCalc shows ads.

### Which is updated more often, iLQ or LQCalc?

iLQ ships an update every 48 months, and LQCalc every 10 months. Most recently, iLQ was updated on November 1, 2026 and LQCalc on November 3, 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.*