iArrest vs Messly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Messly
This app connects physicians with locum tenens staffing companies. Build a profile detailing your preferences and receive direct pitches for assignments with rates shown upfront. You control who you communicate with, streamlining the job search process.
- Personalized job profile
- Upfront rate information
- Anonymity until shared
- Direct assignment pitches
- Control over communication
- All-in-one messaging and calls
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Find locum tenens work that pays more and fits your life. Most physicians pick a staffing company more or less at random, hand over their details and hope for the best. Register with a few more and you're filling in the same forms again, then fielding calls you never asked for. It shouldn't be this hard. Messly works the other way round. You build one profile saying what you want. Hand-picked staffing companies pitch you real assignments, with the rate shown upfront. You choose who to talk to. HOW IT WORKS 1. Tell us what you want Your specialty, the states you're licensed in, IMLC, availability, schedule, minimum rate and how far you'll travel. It takes a few minutes, and you stay anonymous: recruiters only see your first name. 2. Get pitched real assignments Recruiters send matched assignments straight to your Messly inbox, with the rate, location and schedule upfront. No vague promises of work that never materializes. 3. Choose who you talk to See who each recruiter is and which staffing company they work for before you reply. When you like an assignment, book a call at a time that suits you. Your contact details are only shared with the companies you choose. 4. Start working The staffing company you pick handles credentialing and gets you started, as normal. There's no obligation at any point. WHY PHYSICIANS USE MESSLY The best assignments: access to a hand-picked group of the best locum tenens staffing companies, in one place Rates upfront: see the pay on every assignment before you engage No spam: you're anonymous until you choose to share your details, so no unsolicited calls, texts or emails You're in control: turn your profile off any time and nobody can contact you. Turn it back on in one tap Everything in one app: assignments, messages and calls, on your phone or computer. WHO IT'S FOR Attending physicians, fellows and residents looking to moonlight, in every specialty. Whether you're new to locum tenens or looking for a better staffing company than the one you have, Messly takes the guesswork out. MESSLY IS NOT A STAFFING COMPANY We don't place you ourselves. We bring the best staffing companies together, hold them to a strict code of conduct, and let you choose who to work with. Any company that falls short is removed, and our team is on hand if you ever need help. Over 45,000 physicians have used Messly to find locum tenens work in the UK and Australia. Messly is part of M3 and a sister company to PracticeMatch. FOR RECRUITERS Already on Messly? The same app keeps you on top of your desk when you're away from it. See recommended physicians matched to your alerts, view anonymized profiles, manage your inbox and message physicians, with push alerts for new messages and newly shared physicians. Sign in with your existing Messly account. Questions? We're here to help at support@messly.com
Screenshots
Verdict
The clearest difference is update cadence: Messly at every 3 months against iArrest's every 13 months. iArrest's advantage is ratings volume (3 vs 1) and iOS requirement (12.0 vs 15.4). On price, rating, ads and in-app purchases 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.
On the App Store both sit at effectively the same score — 5.0 for iArrest against 5.0 for Messly. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
iArrest ships an update every 13 months, Messly every 3 months. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.
| Parameter | iArrest | Messly |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Positive reviews | 94.1% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 13 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.4 |
| Further details — not scored | ||
| Size | 31 MB | 34 MB |
| Age rating | 12+ | 4+ |
| Developer | Maximilian Neun | Messly |
Customer experience
iArrest
Messly
In-app purchases
iArrest
No in-app purchases
Messly
No in-app purchases








