Blood Components vs iArrest
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Blood Components
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.
- 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
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Blood Components App summarises relevant national guidelines to act as a guide for clinicians to facilitate appropriate use of blood and enable robust documentation of indications. The App has been updated and is based on the National Blood Transfusion Committee (NBTC) Indication Codes for Transfusion (2020), the British Society of Haematology (BSH) Guideline on transfusion for foetuses, neonates and older children (2016) and The National Institute for Health and Care Excellence (NICE) Blood transfusion [NG24] guidelines . The App should be used in conjunction with the full guidelines.
iArrest
This app assists healthcare professionals during cardiac arrest calls by providing structured guidance based on the latest resuscitation guidelines. It includes timers for critical interventions and generates detailed event logs for documentation. Designed for paramedics and hospital clinicians, it acts as a reminder for essential tasks in high-pressure situations.
- Structured cardiac arrest guidance
- Adult resuscitation scenarios
- Based on UK Resuscitation Council Guidelines 2021
- Timers for rhythm analysis and adrenaline
- Audible and visual intervention reminders
- Continuous use prevention of sleep mode
- Detailed event logging
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iArrest was developed to give healthcare professionals a powerful tool to navigate stressful and challenging cardiac arrest calls. Whether as a Paramedic on scene or as a clinician in hospital, this app can assist in running structured and effective adult cardiac arrest scenarios. Developed by clinicians working in large inner city teaching hospitals, this app takes into consideration the most recent Resuscitation Council (UK) Guidelines 2021. It serves as an aide-memoire for basic tasks that can easily be overlooked in stressful scenarios. iArrest also incorporates a number of timers to assist with rhythm analysis, adrenaline timings and arrest documentation. It will remind the user via audible and visual cues about necessary interventions even if a clinician’s phone is muted. iArrest has been programmed to prevent phones from going into sleep mode, in order to ensure continuous use throughout the arrest. iArrest will record the exact time an important event or an intervention has occurred and present the user with a detailed log of events. These logs can be copied to the clipboard and used for documentation and record keeping. iArrest is currently undergoing extensive testing in simulated and real world scenarios. We are continuously improving and expanding on iArrest’s functionality. Disclaimer: iArrest can not replace sound knowledge in Advance Life Support and should not be used by non-ALS trained clinicians. Use this app at your own risk and always use appropriate clinical judgement. Please familiarise yourself with the functionality of this app before using it in real life scenarios. The creators of this app shall not be liable for any claims or losses arising from the use or misuse of this app, its contents, any omissions from its contents, or otherwise. By using this app you agree to these terms and conditions.
Screenshots
Verdict
The clearest difference is iOS requirement: iArrest at 12.0 against Blood Components's 15.1. On price, review sentiment, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Blood Components ships an update every 19 months, iArrest every 13 months. Both last shipped on September 21, 2026.
| Parameter | Blood Components | iArrest |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 94.1% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 19 months | Every 13 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 31 MB |
| Age rating | 17+ | 12+ |
| Developer | NHS | Maximilian Neun |
Customer experience
Blood Components
iArrest
In-app purchases
Blood Components
No in-app purchases
iArrest
No in-app purchases








