# I.C.U. RenalCalc vs EchoRef

The clearest difference is price: EchoRef at Free against I.C.U. RenalCalc's $4.99. EchoRef also leads on ratings volume (1.4K vs 1) and update cadence (every 2 months vs every 6 months). I.C.U. RenalCalc's advantage is iOS requirement (12.0 vs 26.0). On rating, ads, in-app purchases and device support there is nothing between them.

EchoRef is free to download; I.C.U. RenalCalc costs $4.99 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 I.C.U. RenalCalc against 4.9 for EchoRef. That said, the two scores are not equally well evidenced: EchoRef has 1.4K ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 86% of I.C.U. RenalCalc's written reviews are positive against 100% of EchoRef's.

I.C.U. RenalCalc ships an update every 6 months, EchoRef every 2 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | I.C.U. RenalCalc | EchoRef |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/icu-renalcalc/id551550612/reviews)** | [4.9 (1.4K ratings)](https://appshunter.io/ios/app/echoref/id1434016053/reviews) |
| Number of ratings | 1 | **1.4K** |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 9 MB | 104 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Antoni Betbese](https://appshunter.io/developer/551550615) | [Rishi Kumar](https://appshunter.io/developer/1434016052) |

## What reviewers say

### I.C.U. RenalCalc

[App page](https://appshunter.io/ios/app/icu-renalcalc/id551550612)

This medical app offers essential calculations for continuous renal replacement therapy in critical care settings. It assists with dose and volume calculations for convection and diffusion, filter efficiency, and coagulation parameters. Additionally, it includes modules for specific calculations like filtration fraction and transmembrane pressure.

**Highlights:** Continuous renal replacement therapy calculations, Dose and volume calculations (PRE/POST), Filter efficiency and Kuf calculation, Coagulation calculations, Filtration fraction module, Transmembrane pressure (TMP) module, Renal function and electrolyte calculations

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

**In-app purchases:** none


### EchoRef

[App page](https://appshunter.io/ios/app/echoref/id1434016053)

This educational reference app provides comprehensive information on point-of-care ultrasound (POCUS), echocardiography, and cardiac measurements. It includes lessons on interventional procedures and hemodynamic calculations for medical professionals.

**Highlights:** Point-of-care ultrasound (POCUS), Transthoracic echocardiography (TTE), Transesophageal echocardiography (TEE), Cardiac dimensions and valve measurements, Hemodynamic and ultrasound calculations, Interventional procedure lessons

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

**In-app purchases:** none


## Frequently asked questions

### Is I.C.U. RenalCalc free?

I.C.U. RenalCalc costs $4.99, with no in-app purchases.

### Is EchoRef free?

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

### Which has better reviews, I.C.U. RenalCalc or EchoRef?

I.C.U. RenalCalc is rated higher. I.C.U. RenalCalc averages 5.0 out of 5 from 1 ratings, while EchoRef averages 4.9 from 1.4K ratings.

### Do I.C.U. RenalCalc or EchoRef have ads?

Neither I.C.U. RenalCalc nor EchoRef shows ads.

### Which is updated more often, I.C.U. RenalCalc or EchoRef?

I.C.U. RenalCalc ships an update every 6 months, and EchoRef every 2 months. Most recently, I.C.U. RenalCalc was updated on October 26, 2026 and EchoRef on October 25, 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.*