MDU vs On
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MDU
Access expert medico-legal advice for medical professionals. Find guidance on patient confidentiality, prescribing, complaints, and more through articles, case studies, and quick guides. Tailor your feed and access membership details offline.
- Expert medico-legal advice
- Quick guides and case studies
- Searchable articles
- Tailorable news feed
- Offline reading
- Membership card access
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As a medical professional, you can access expert advice from the Medical Defence Union (MDU). Read the latest medico-legal advice on patient confidentiality, consent, prescribing, police investigations, inquests, how to respond to patient complaints, and much more. Search our extensive range of quick guides, case studies, frequently asked questions and articles from our popular MDU Journal. You can tailor your news feed to show topics you’re interested in, read offline, get help with your membership, view your membership card and get proof of membership. Download the MDU app now for top medico-legal advice wherever you go.
On
Manage on-call shifts and track medical jobs efficiently. Prioritize workload, generate handover summaries instantly, and ensure data privacy with local storage. Designed by a doctor for fast, secure use during busy shifts.
- Track urgent and routine jobs
- Prioritize workload
- Generate structured handover summaries
- Secure local data storage
- Face ID protection
- Fast and intuitive interface
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On-call is the job management app built specifically for doctors working on-call shifts. It gives you a clean, fast way to track jobs, prioritise your workload and hand over safely. Track jobs the way you actually work. Add urgent and routine jobs as the bleeps come in. Handover in seconds. Generate a clean, structured summary in one tap. Send via messages, qr code or airdrop. Your data stays on your device, On-call stores everything locally. No accounts, no cloud sync, no analytics, no tracking. Data never leaves your phone. Face ID protection keeps the app locked between uses. Designed by a doctor, for doctors. Every design decision was made with a busy on-call shift in mind. Fast to open, fast to add a job, fast to clear one when it's done. On-call is completely free.
Screenshots
Verdict
The clearest difference is review sentiment: On at 100% against MDU's 17%. On also leads on update cadence (weekly vs every 3 months). MDU's advantage is in-app purchases (none vs 1) and iOS requirement (12.2 vs 17.6). On price, ads, monetization model 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. On sells 1 one-off in-app purchase. MDU asks for nothing beyond the download.
MDU ships an update every 3 months, On weekly. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.
| Parameter | MDU | On |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 16.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 12.2 — better | 17.6 |
| Further details — not scored | ||
| Size | 165 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | The Medical Defence Union | Mohsin Asad Sadiq |
Customer experience
MDU
On
In-app purchases
MDU
No in-app purchases
On
- Buy me a coffee$2.99
