Blood Components vs On
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Blood Components
This app provides clinicians with a summary of national guidelines for the appropriate use of blood components. It facilitates robust documentation of transfusion indications, referencing key medical guidelines.
- Summarizes national blood transfusion guidelines
- Facilitates appropriate blood use
- Enables documentation of transfusion indications
- References NBTC, BSH, and NICE guidelines
- Acts as a clinical reference tool
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Blood Components App summarises relevant national guidelines to act as a guide for clinicians to facilitate appropriate use of blood and enable robust documentation of indications. The App has been updated and is based on the National Blood Transfusion Committee (NBTC) Indication Codes for Transfusion (2020), the British Society of Haematology (BSH) Guideline on transfusion for foetuses, neonates and older children (2016) and The National Institute for Health and Care Excellence (NICE) Blood transfusion [NG24] guidelines . The App should be used in conjunction with the full guidelines.
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 in-app purchases: Blood Components at none against On's 1. Blood Components also leads on iOS requirement (15.1 vs 17.6). On's advantage is update cadence (weekly vs every 19 months). On price, review sentiment, ads 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
Both are free to download. On sells 1 one-off in-app purchase. Blood Components asks for nothing beyond the download.
Blood Components ships an update every 19 months, On weekly. Both last shipped on October 8, 2026.
| Parameter | Blood Components | On |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Update frequency | Every 19 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 | 15.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 16 MB | 8 MB |
| Age rating | 17+ | 4+ |
| Developer | NHS | Mohsin Asad Sadiq |
Customer experience
Blood Components
On
In-app purchases
Blood Components
No in-app purchases
On
- Buy me a coffee$2.99
