# iResus vs Blood Components

The clearest difference is review sentiment: Blood Components at 100% against iResus's 50%. iResus's advantage is update cadence (every 7 months vs every 19 months) and iOS requirement (9.0 vs 15.1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iResus ships an update every 7 months, Blood Components every 19 months. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | iResus | Blood Components |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/iresus/id1034079078/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 19 months |
| Monetization | Free | Free |
| Size | 7 MB | 16 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [RESUSCITATION COUNCIL (U.K.) TRADING LTD](https://appshunter.io/developer/1034079077) | [NHS](https://appshunter.io/developer/1192687136) |

## What reviewers say

### iResus

[App page](https://appshunter.io/ios/app/iresus/id1034079078)

Access the latest adult, pediatric, newborn resuscitation, and anaphylaxis algorithms offline. This free tool is compliant with Resuscitation Council UK Guidelines 2021 and available on multiple devices.

**Highlights:** Offline algorithm access, Adult resuscitation guidelines, Pediatric resuscitation guidelines, Newborn resuscitation guidelines, Anaphylaxis algorithms, Compliant with UK guidelines

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

**In-app purchases:** none


### Blood Components

[App page](https://appshunter.io/ios/app/blood-components/id1221434626)

This app provides clinicians with a summary of national guidelines for the appropriate use of blood components. It facilitates robust documentation of transfusion indications, referencing key medical guidelines.

**Highlights:** Summarizes national blood transfusion guidelines, Facilitates appropriate blood use, Enables documentation of transfusion indications, References NBTC, BSH, and NICE guidelines, Acts as a clinical reference tool

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

**In-app purchases:** none


## Frequently asked questions

### Is iResus free?

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

### Is Blood Components free?

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

### Do iResus or Blood Components have ads?

Neither iResus nor Blood Components shows ads.

### Which is updated more often, iResus or Blood Components?

iResus ships an update every 7 months, and Blood Components every 19 months. Most recently, iResus was updated on October 17, 2026 and Blood Components on October 8, 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.*