Comparison

iArrest vs Messly

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

Messly

Features
Read full description

Messly is a faster, simpler and more transparent way to find locum work. Make your free anonymous profile with your locum wishlist and get pitched relevant locum jobs from the best locum agencies before you've shared your contact details. All our agencies are vetted and chosen based on doctor's feedback. See locum jobs from all of the best agencies up-front, before you’ve shared your personal details. More choice means better rates, less travel and your pick of departments. You manage everything from your mobile, around your schedule, with nifty tools to save you time. Trusted by over 12,000 locum doctors. We’re rated number #1 by doctors looking for locum work.

Screenshots

iArrest4 screens
Messly4 screens

Verdict

The call

The clearest difference is update cadence: Messly at every 2 months against iArrest's every 13 months. On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

iArrest ships an update every 13 months, Messly every 2 months. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 9 level
iArrest versus Messly: the parameters behind the verdict, then further details
ParameteriArrestMessly
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews94.1% of reviews—
Number of ratings3 — better—
Update frequencyEvery 13 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size31 MB37 MB
Age rating12+4+
DeveloperMaximilian NeunMessly

In-app purchases

None

iArrest

No in-app purchases

None

Messly

No in-app purchases

Questions

Is iArrest free?
iArrest is free to download, with no in-app purchases.
Is Messly free?
Messly is free to download, with no in-app purchases.
Do iArrest or Messly have ads?
Neither iArrest nor Messly shows ads.
Which is updated more often, iArrest or Messly?
iArrest ships an update every 13 months, and Messly every 2 months. Most recently, iArrest was updated on October 8, 2026 and Messly on October 7, 2026.

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