ACLS Fast vs Diagnosaurus® DDx
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ACLS Fast
This app provides rapid guidance for ACLS 2020 guidelines, helping users quickly determine appropriate therapies through a question-based system. It includes information on rhythms, arrhythmias, acute coronary and stroke syndromes, and features a two-minute timer for code management.
- Question-based therapy guidance
- Rhythms and arrhythmias management
- Acute coronary and stroke syndrome protocols
- Two-minute code timer with alarm
- Interactive multiple-choice exams
- Rapid diagnosis and treatment support
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This is the fastest utility for managing and preparing for the ACLS 2020 guidelines. Unlike other apps that present algorithm sheets, this smart utility guides you to the pertinent therapy by asking one to two questions. ACLS Fast gives you all the rhythms and arrhythmias along with the specific treatments. You also have acute coronary and stroke syndrome management. In addition, there is a two minute timer to assist you with time management during a code. Now you don't have to second guess when two minutes pass and it is time to recheck vitals and shock. Every two minutes a loud alarm activates. The timer is resettable. Need to start inotropes, but you can't remember the right ones? This app has it and it is fast! Finally, you can take an interactive exam. There are many multiple-choice questions from which you can choose. Use this to test your knowledge or sharpen your ability to take care of patients. You can use the app in the field and hospital for rapid diagnosis and treatment. You can also use it as a quick, comprehensive study tool. Either way, nothing is this fast or simple. Also, check out PALS Fast for pediatrics.
Diagnosaurus® DDx
This medical reference tool assists healthcare professionals in performing differential diagnoses quickly and confidently. It offers a searchable database of over 1,000 diagnoses, cross-referenced for related conditions, and allows users to save favorite entries and make custom notes.
- Over 1,000 differential diagnoses
- Search by organ system, symptom, or disease
- See Related DDx feature
- Save favorite entries
- Highlight and make custom notes
- Universal Index Search
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** Top-Selling App Used by Tens of Thousands of Health Professionals, Worldwide ** ABOUT DIAGNOSAURUS DDX This quick-reference tool helps healthcare professionals perform differential diagnosis with speed and confidence at the point of care. With Diagnosaurus you can quickly search over 1,000 diagnoses by organ system, symptom, or disease, or you can view all entries. Use the valuable “See Related DDx” feature within each entry to consider alternative diagnoses and quickly link to those entries. The convenient “Favorites” feature allows you to save specific searches and bookmark in your personal archive. FEATURES • More than 1,000 differential diagnoses • Highlight and make custom notes within entries • Entries organized in quick-read format • “See Related DDx” links to other potential diagnoses • Disease, symptom, and organ system indexes • “Favorites” for bookmarking important entries • Universal Index Search to help find answers fast Author: Roni F. Zeiger, MD Publisher: McGraw-Hill Medical Powered by: Unbound Medicine
Screenshots
Verdict
The clearest difference is price: Diagnosaurus® DDx at Free against ACLS Fast's $3.99. Diagnosaurus® DDx also leads on rating (4.8 vs 2.8) and ratings volume (2.5K vs 4). ACLS Fast's advantage is in-app purchases (none vs 1) and review sentiment (76% vs 53%). On 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
Diagnosaurus® DDx is free to download; ACLS Fast costs $3.99 up front. Diagnosaurus® DDx sells 1 one-off in-app purchase. ACLS Fast asks for nothing beyond the download.
Diagnosaurus® DDx holds the better App Store score, 4.8 against 2.8. That said, the two scores are not equally well evidenced: Diagnosaurus® DDx has 2.5K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 76% of ACLS Fast's written reviews are positive against 53% of Diagnosaurus® DDx's, so the app with the better star average is not the one people write more warmly about.
ACLS Fast ships an update every 3 months, Diagnosaurus® DDx every 10 months. Both last shipped on September 24, 2026.
| Parameter | ACLS Fast | Diagnosaurus® DDx |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 2.8 (4 ratings) | 4.8 (2.5K ratings) — better |
| Positive reviews | 75.8% of reviews — better | 53.2% of reviews |
| Number of ratings | 4 | 2.5K — better |
| Update frequency | Every 3 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 20 MB | 18 MB |
| Age rating | +17 | 17+ |
| Developer | Crystal Clear Solutions | Unbound Medicine, Inc. |
Customer experience
ACLS Fast
Diagnosaurus® DDx
Bugs and requests
ACLS Fast
Not enough reviews yet to summarise bugs or requests.
Diagnosaurus® DDx
Reported bugs
3 issues- Subscription issues and inability to restore purchases
- Blank pages and non-functional content
- Compatibility issues with newer iOS versions
Requested features
5 requests- Add ability to edit or add custom differential diagnoses
- Improve search functionality and navigation
- Provide more detailed information on conditions
- Integrate with other medical resources and databases
- Improve support for older devices and iOS versions
In-app purchases
ACLS Fast
No in-app purchases
Diagnosaurus® DDx
- Diagnosaurus DDx$4.99
