# iDCalc vs EQD Calculator

The clearest difference is price: EQD Calculator at Free against iDCalc's $2.99. EQD Calculator also leads on update cadence (every 3 weeks vs every 8 months) and ratings volume (7 vs 2). iDCalc's advantage is rating (5.0 vs 4.4) and review sentiment (100% vs 75%). On ads, in-app purchases and device support there is nothing between them.

EQD Calculator is free to download; iDCalc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iDCalc holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 2 and 7 respectively. Written reviews point the same way: 100% of iDCalc's written reviews are positive against 75% of EQD Calculator's.

iDCalc ships an update every 8 months, EQD Calculator every 3 weeks. The most recent releases landed on August 14, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | iDCalc | EQD Calculator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/idcalc/id556863722/reviews)** | [4.4 (7 ratings)](https://appshunter.io/ios/app/eqd-calculator/id898546583/reviews) |
| Number of ratings | 2 | **7** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 15 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Mevis Informática Médica Ltda.](https://appshunter.io/developer/556863725) | [Hiroyuki KATOH](https://appshunter.io/developer/898546586) |

## What reviewers say

### iDCalc

[App page](https://appshunter.io/ios/app/idcalc/id556863722)

This medical app assists radiotherapists and medical physicists with routine computations in radiation therapy and nuclear medicine. It offers tools for translating radiation quality specifications, calculating isotope decay, and determining equivalent square fields.

**Highlights:** Radiation quality specification translation, Isotope decay calculation, Equivalent square field computation, Percent Depth Dose (PDD) calculation, Normalized Peak Scatter Factor (NPSF) calculation, Built-in library of radiation beams

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

**In-app purchases:** none


### EQD Calculator

[App page](https://appshunter.io/ios/app/eqd-calculator/id898546583)

This app assists radiation oncology professionals in calculating Biologically Effective Dose (BED) and Equivalent Dose (EQD) for radiotherapy. It offers quick and easy results, allowing for adjustments to treatment schedules and estimation of treatment effects.

**Highlights:** Calculate BED and EQD, Adjust radiotherapy schedules, Estimate treatment effects, View alpha/beta ratio and tolerance dose tables, Organize with URL scheme

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iDCalc free?

iDCalc costs $2.99, with no in-app purchases.

### Is EQD Calculator free?

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

### Which has better reviews, iDCalc or EQD Calculator?

iDCalc is rated higher. iDCalc averages 5.0 out of 5 from 2 ratings, while EQD Calculator averages 4.4 from 7 ratings.

### Do iDCalc or EQD Calculator have ads?

Neither iDCalc nor EQD Calculator shows ads.

### Which is updated more often, iDCalc or EQD Calculator?

iDCalc ships an update every 8 months, and EQD Calculator every 3 weeks. Most recently, iDCalc was updated on August 14, 2026 and EQD Calculator on June 10, 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.*