SubtleSTEMI vs MobilEM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SubtleSTEMI
This medical app calculates the formula from a specific research paper to help differentiate early repolarization from subtle anterior ST-segment elevation myocardial infarction. It provides a tool for medical professionals to aid in diagnosis.
- ECG formula implementation
- Differentiates early repolarization
- Identifies subtle anterior ST-segment elevation myocardial infarction
- Diagnostic aid for medical professionals
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Calculator implementing the formula from the paper, "Electrocardiographic differentiation of early repolarization from subtle anterior st-segment elevation myocardial infarction," by Smith, et al.
MobilEM
Provides fast, evidence-based clinical guidance for emergency medicine professionals. Access updated recommendations on a wide range of topics, including antibiotics, toxicology, and critical care. Offers free content, individual purchases, and an all-access subscription.
- Evidence-based recommendations
- Antibiotic and toxicology guidance
- EKG and orthopedic injury protocols
- Airway and pediatric emergency management
- Critical care medication information
- Fast navigation and universal search
- Bookmarking and note-taking
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One of our greatest privileges at EMRA is offering resources that can help make every clinical shift easier, through evidence-based guidance in your pocket. Get updated recommendations for antibiotics, toxicology, EKGs, orthopedic injuries, airway management, pediatric emergencies, splinting, critical care medications, and more. Enjoy free content, purchase our resources a la carte, or subscribe to our all-access pass (best value!) to take full advantage of these key features: • Fast, easy navigation • Powerful universal search • Bookmarking • Note-taking fields • Continual updates that require no action on your part We hope you find MobilEM to be useful; check back often, as we will be adding new content on a regular basis. Please note: EMRA is committed to your privacy. See our policy at https://www.emra.org/about-emra/privacy-policy/. Terms of Use: This and all other digital reference content, including all content offered under subscription is intended for a single user on devices belonging to that user. Use of this app running on a common device shared by an organization is disallowed. For further information on terms of use and EULA please see: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ This app is intended for the US healthcare market.
Screenshots
Verdict
The clearest difference is review sentiment: SubtleSTEMI at 100% against MobilEM's 45%. SubtleSTEMI also leads on rating (4.2 vs 3.6) and in-app purchases (none vs 12). MobilEM's advantage is update cadence (every 2 months vs every 8 months) and chart position (#42 vs unranked). On price, ads 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
Both are free to download. MobilEM sells 12 in-app purchases, starting at $1.99 per year. SubtleSTEMI asks for nothing beyond the download.
SubtleSTEMI holds the better App Store score, 4.2 against 3.6. Both are backed by a comparable volume of ratings — 9 and 39 respectively. Written reviews point the same way: 100% of SubtleSTEMI's written reviews are positive against 45% of MobilEM's.
SubtleSTEMI ships an update every 8 months, MobilEM every 2 months. The most recent releases landed on October 23, 2026 and October 26, 2026 respectively.
| Parameter | SubtleSTEMI | MobilEM |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (9 ratings) — better | 3.6 (39 ratings) |
| Positive reviews | 100.0% of reviews — better | 45.0% of reviews |
| Number of ratings | 9 | 39 — better |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | — | #42 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 15 MB | 205 MB |
| Age rating | 17+ | 17+ |
| Developer | Mark Newcomb | Emergency Medicine Residents' Association |
Customer experience
SubtleSTEMI
MobilEM
In-app purchases
SubtleSTEMI
No in-app purchases
MobilEM
- Ventilator Mgmt. Subscription$1.991 Year
- Pediatric Qwic$1.991 Year
- MobilEm Airway Management$4.991 Year
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- Trauma Guide$4.991 Year
- Antibiotic Guide Subscription$9.991 Year
- MobilEm Ortho Guide$9.991 Year
- MobilEM Tox Guide$9.991 Year
- PressorDex$9.991 Year
- EKG Guide Subscription$9.991 Year
- Pain Management$9.991 Year
- PEM Fundamentals Subscription$9.991 Year
- MobilEm All Access Pass1 Month trial$39.991 Year









