Lytes vs MD on Call
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lytes
Provides quick, at-your-fingertips information on the causes, symptoms, diagnosis, and treatment of electrolyte disorders. Features an intuitive interface for rapid access to practical medical knowledge, including references to PubMed.
- Causes, signs, diagnosis, and treatment of electrolyte disorders
- Intuitive single-screen interface
- 50 pages of practical medical information
- Resume reading where you left off
- PubMed reference links
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Ah, electrolytes... They always seem to be too high or too low. But it's your job to get them back in line. Enter Lytes, the program that provides quick, at-your-fingertips information about the causes, symptoms, diagnosis, and treatment of electrolyte disorders. Our Lytes Selection Dial lets you drill down to the info you need within seconds. Features: • See causes, signs, diagnosis, and treatment with a flick of the thumb • Intuitive single screen interface keeps things straighforward • 50 pages of practical info for the wards • Lytes remembers where you left off when you return • All disorders provided with a reference section with links to PubMed ********************************** If you like the program please rate it. If you have any concerns or find any bugs please contact us at support@freeradicalsoft.com DISCLAIMER: Please consider that information provided by this program is intended to supplement but not substitute for the expertise and clinical judgment of a healthcare professional. The educational material is provided as is, and Free Radical does not warrant that it is accurate or up to date, although that is certainly our goal.
MD on Call
This app provides quick, practical guidance for physicians, residents, and medical students to manage common on-call issues. It offers concise tips for acute assessment and management, helping users efficiently address patient problems without needing to consult lengthy textbooks.
- Quick assessment and management tips
- Covers 26 frequent on-call situations
- Management of common electrolyte abnormalities
- ECG interpretation with examples
- Guidance on writing medical orders
- Searchable by acronyms and keywords
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"fantastic for a review when rushing to a consult." -- Casey Park MD on Call is already trusted by thousands of physicians, residents and medical students around the world. We’ve been there; At 3 AM, you don’t feel like going through a textbook or a long UpToDate article; you just want to get things done. **************** REVIEWS "If you have ever needed a quick reference to learn on the fly or been stumped by a late night call while cross-covering and you are willing to spend a few dollars to avoid that feeling, you should consider this app." iMedicalApps.com “It has all those handy little things that drug guides and medical references just don’t capture concisely.” “I would pay at least double the cost for this handy little reference.” Dr Jessica Otte, drottematic blog **************** **************** AUDIENCE junior residents, interns and medical students INTRO In medical school, we learn a lot about diseases and the basis for their management. However, we are traditionally less exposed to apparently easy problems like pain, nausea or hypokalemia. Quite often, those issues are brought to the attention of the nursing staff in the evening. At that time, the treating team is away and you're on call, running all over the hospital. MD on Call gives you tips on how to QUICKLY assess and manage (acutely) common problems so you can go on assessing the next patient, or to your room to get some well deserved sleep. -- it is NOT meant to replace a textbook -- FEATURES MD on call is divided into 5 main sections: • Issues • 26 frequent on call situations (including management of some specific conditions) Abdominal Pain* Acute Coronary Syndrome* Agitation / Violence Anaphylaxis Bleeding Bradycardia* Chest Pain Constipation Death (Pronouncing) Decreased LOC Dysuria / UTI* Dyspnea Fever Febrile neutropenia Headache Hypertension Hypotension Insomnia Meningitis Nausea / Vomiting Pain Palliation Pneumonia Seizure Tachycardia Wound Dehiscence Wound Infection • Labs • Common electrolytes abnormalities (including management) Hypo Ca, K, Mg, Na, PO4, glycemia Hyper Ca, K, Na, glycemia • ECG • Normal and abnormal ECG values, now with examples • Misc • Suggestions on how to write orders for admission, "comfort measures only", "on call" notes, OR and procedure notes. Transfusions: general information and common reactions Misc: CSF values, opioid conversion... • Lines and Tubes • How to manage common problems, such as a blocked NG tube. • Search • Search using acronyms or keywords **************** Feedback is more than welcome : visit the website for more details **************** DISCLAIMER This publication (application) is to be used as a guide only. It is intended only for use by licensed medical practitioners and medical students. Every doctor (or prescriber) is responsible for their actions. This guide is not meant to replace clinical judgment. The authors of MD on call make no claims regarding the accuracy of the information contained herein. The authors of this application and its content shall not be liable for any injury and/or damage to persons or property arising from the use of this application. It is the responsible of the licensed prescriber to verify the indications, contraindications and dosage of the medication (and actions) they prescribe.
Screenshots
Verdict
The clearest difference is price: Lytes at $2.99 against MD on Call's $9.99. Lytes also leads on ratings volume (10 vs 1) and iOS requirement (14.1 vs 16.0). MD on Call's advantage is rating (5.0 vs 4.8) and review sentiment (78% vs 67%). On update cadence, ads, in-app purchases and monetization model 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
Lytes costs $2.99 and MD on Call $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MD on Call holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Lytes has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of Lytes's written reviews are positive against 78% of MD on Call's.
Lytes ships an update every 3 months, MD on Call every 4 months. Both last shipped on October 26, 2026.
| Parameter | Lytes | MD on Call |
|---|---|---|
| Price | $2.99 — better | $9.99 |
| Rating | 4.8 (10 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | 78.1% of reviews — better |
| Number of ratings | 10 — better | 1 |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 17 MB |
| Age rating | 17+ | 17+ |
| Developer | Free Radical Software | Messil inc. |
Customer experience
Lytes
MD on Call
Bugs and requests
Lytes
Not enough reviews yet to summarise bugs or requests.
MD on Call
Reported bugs
3 issues- Incompatible with iPhone X
- Incorrect advice regarding Metaclopramide
- Incorrect TDF to morphine conversion data
Requested features
16 requests- Cover more content
- Update for iPhone X compatibility
- Revise content and references for up-to-date information
- Add more conditions
- Include common diseases and treatments
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- Add an 'edit' function to modify and add vignettes
- Add more clinical scenarios
- Add medicine dose information
- Add drug interaction information
- Include more information with supporting references
- More streamlined interface
- Translate to German
- Translate to French
- Add more topics
- Add more clinical high yields and topics
- Add more futures needed while oncall
In-app purchases
Lytes
No in-app purchases
MD on Call
No in-app purchases






